Opinion
THE COURT.*The parties to this action are the plaintiff/appellant, Placentia-Linda Community Hospital, Inc. (hereafter hospital) and the respondent, the Director of the Office of Statewide Health Planning and Development for the State of California (hereafter director).
On May 1, 1979, the trial court denied hospital’s petition for a writ of mandate to require the director to issue a certificate of exemption pursuant to Health and Safety Code section 437.13, exempting hospital from the requirements of Health and Safety Code section 437.10. The hospital had made application to the director for a certificate of exemption for a contemplated addition of 3,290 square feet to enable hospital to relocate beds from preexisting three-bed rooms to two-bed rooms. *852The total cost of the project was less than the $250,000 threshold amount prescribed in section 437.13, subdivision (a)(8).
By letter dated November 15, 1978, the director denied the hospital’s application upon the finding that: “The project is not a remodeling or replacement project. The project is essentially, the addition of a new wing of approximately 3,290 square feet of floor area to the hospital, space that is to house seven (7) new two-bed patient rooms. All existing space is to be retained, therefore this project is not the type that can be exempted under section 437.13. The certified cost estimate for project portion of the application shows $204,723.00 for new construction and no expenditure for reconstruction. This is further evidence that the project is not basically a remodeling/replacement project.”
By letter dated January 19, 1979, at the request of the hospital, the director further explained his original denial by quoting the dictionary definition of the words “replace” and “remodel” and stated, inter alia, “None of these definitions lends any support to a claim that an exemption provision that is explicitly for remodeling and replacement projects could be understood to apply to an expansion project. That is, physical expansion of existing buildings is simply not included within the meaning of ‘remodeling’ or ‘replacement.’”
It is conceded by the director that prior to January 1, 1978, the director had granted cértificates of exemption for projects indistinguishable from the proposed project of the hospital, pursuant to the director’s then interpretation of section 437.13. Director contends that the Legislature amended section 437.13 effective January 1, 1978, and (although the amendments themselves did not change any part of the statute which is relevant to a determination as to whether or not hospital is entitled to a certificate of exemption), the fact that the statute was amended caused the office of the director to reanalyze the meaning of the unaffected portions of the statute. As a result of this reanalysis, the director concluded that the original statutory construction which authorized the certificate of exemption to applicants submitting projects indistinguishable from hospital’s was incorrect and that the correct interpretation of the statute excluded “expansion projects.”
Pursuant to sections 437.6 and 437.7 the director has adopted regulations for the implementation of the statutes of which the Health Planning Act is comprised. (Health & Saf. Code, § 437 et seq.) The *853regulations do not define the term “expansion project.” However, California Administrative Code, title 22, section 90001 defines the term “addition” which is used synonymously with the term “expansion project” by the director. “‘Addition’ means the establishment of a new service or the installation of diagnostic or therapeutic equipment which does not replace existing equipment.” (Cal. Admin. Code, tit. 22, § 90001.) This definition is irrelevant in the instant matter because the hospital project did not contemplate the establishment of a new service or the installation of diagnostic or therapeutic equipment. Title 22, California Administrative Code, section 90607 is the regulation which specifies how,an applicant shall proceed in seeking a certificate of exemption and includes most of the language of section 437.13. Section 90607 does not refer to “expansion” or “addition” except as they relate to diagnostic or therapeutic capability or services, neither of which apply to the instant case.
The Legislature adopted the Health Planning Act, of which section 437.13 is a part, in 1967 in response to the enactment of Public Law No. 89-749. (42 U.S.C. §§ 242g, 243, 246.) “One of the purposes of the Legislature in adopting the comprehensive health planning program ‘was to stop or retard the increasing costs of medical care in California’ and proliferation of superfluous health facilities, beds and services by setting forth in a state plan the projected needs for hospital beds and thereafter enforcing compliance with the plan. [Citation.]” (Bakersfield Community Hosp. v. Department of Health (1977) 77 Cal.App.3d 193, 198 [142 Cal.Rptr. 773].)
Section 437.13 provides (in relevant part): “(a) Notwithstanding any other provision of law, no proposal... for the construction of any new health facility to replace.. .in part, any existing health facility ... shall be required to be approved... unless the proposal involves... [II] (8) The replacement.. .of patient rooms and nursing stations costing in excess of two hundred fifty thousand dollars ($250,000).... ” The director contends that, if the foregoing language is construed to include “addition” or “expansion,” the construction would be inconsistent with the purpose of the Health Planning Act. We disagree.
The language “... the replacement... of patient rooms and nursing stations...” obviously refers back to the language “.. .the construction of any new health facility to replace..., in part, any existing health facility...,” in the previously quoted excerpt from section 437.13. It *854cannot be argued that the language “... for the construction of any new health facility...” does not contemplate an “addition” or “expansion.” Any such construction would be, and is, absurd. Further, construing such language to include the concept of “addition” or “expansion” is consistent with the purpose of the act. The Legislature clearly recognized that it was consistent with its policy “... to stop or retard the increasing costs of medical care in California” (Bakersfield, supra) to allow health care facilities to make relatively small capital expenditures. For example, section 437.13, subdivision (b) provides for the reduction in the number of beds authorized at a health care facility (an obvious saving to the consuming public) as to those health care facilities which replace or remodel patient rooms pursuant to section 437.13, subdivision (a)(8) if their licensed bed occupancy rate has been low.
It is equally absurd and contrary to the purpose of the act to assume, as the director implies, that the statute contemplates that, in order for new construction to qualify for certificate of exemption, it would be necessary to abandon an equivalent amount of space. Such a construction of the statute would be diametrically opposed to the purpose of the act by requiring economic waste.
Director argues that had the Legislature intended the language of section 437.13 to include “expansion,” it would have used the term “modernization” which it used in section 437.10 and which was defined in that section as including “expansion.” This argument is untenable. A “replacement” as used in section 437.13 may not be a “modernization” at all and the use of the term “modernization” in that section would have changed the meaning of the section. The fact that the Legislature defined the term “modernization” to include the term “expansion” in section 437.10 is not in the least bit helpful in construing section 437.13. Including the term “expansion” within the term “modernization” in section 437.10 was necessary because the word “modernization” would not otherwise have included the concept of expansion.
The director correctly asserts that a change in interpretation is not prohibited even though different results on the same set of facts in two different time periods is the result. (Weiss v. State Board of Equalization (1953) 40 Cal.2d 772 [256 P.2d 1].) However, an administrative agency cannot add to, subtract from or change the clear meaning of a statute as the director has done in construing section 437.13 (Duskin v. State Board of Dry Cleaners (1962) 58 Cal.2d 155 [23 Cal.Rptr. 404, *855373 P.2d 468]) and the interpretation of a statute is ultimately a judicial function. (Anderson Union High School Dist. v. Schreder (1976) 56 Cal.App.3d 453 [128 Cal.Rptr. 528]; Evid. Code, § 310.)
The judgment denying the petition for writ of mandate is reversed. The matter is remanded to the trial court with directions to issue the writ of mandate as prayed.
Before Gardner, P. J., Tamura, J., and McDaniel, J.