Irene Kae Enzensperger, MD
Family Medicine Physician · Upland, CA
Irene Kae Enzensperger, MD is a family medicine physician with a practice address in Upland, California, and NPI 1174693659, issued on Nov 9, 2006. Check the license (California G23211, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irene Kae Enzensperger
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G23211 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1060 E Foothill Blvd Ste 202, Upland, CA 91786
- Phone
- (909) 949-0220
- Enumerated
- Nov 9, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (909) 949-0309
- Medicaid ID
- 00G232110 CA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Irene Kae Enzensperger in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G23211Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average family medicine physician in 2024
863 Medicare Part D claims for 116 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate77 claims
- Levothyroxine Sodium74 claims
- Losartan Potassium55 claims
- Fenofibrate34 claims
- Atorvastatin Calcium30 claims
- Hydrochlorothiazide22 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Irene Kae Enzensperger among 17,133 family medicine physician records in California
Irene Kae Enzensperger, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 family medicine physician records list a practice address in Upland
They are 38 of the 1,846 NPPES records with a practice address in Upland, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Upland → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Richard Armour, D.OUpland, CA 917861366488215
- Louis Brenner, M.D.Upland, CA 917861003852815
- Bryan Chan, MDUpland, CA 917861417059957
- Louis Dibernardo, MDUpland, CA 917861528045358
- Warren Regh Gabrillo, M.D.Upland, CA 917861982689295
- Dwight Guan, MDUpland, CA 917861184644676
- Rick Hirsch, D.O.Upland, CA 917861497774954
- James Ho, MDUpland, CA 917861669440988
Common questions
What is Irene Kae Enzensperger, MD's NPI number?
Irene Kae Enzensperger, MD's National Provider Identifier (NPI) is 1174693659, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Irene Kae Enzensperger, MD located?
The NPPES record lists a practice address at 1060 E Foothill Blvd Ste 202, Upland, CA, 91786. Phone: (909) 949-0220. Providers update this record themselves, so call before visiting.
How can I verify Irene Kae Enzensperger, MD's license?
NPPES lists California license number G23211, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Irene Kae Enzensperger, MD prescribe under Medicare Part D?
In 2024, Irene Kae Enzensperger, MD had 863 Medicare Part D claims for 116 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.