Anne Margaret Porzig, M.D.
Endocrinology, Diabetes & Metabolism Physician · Palo Alto, CA
Anne Margaret Porzig, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Palo Alto, California, and NPI 1144420902, issued on Jul 20, 2007. Check the license (California A99582, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Anne Margaret Porzig
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A99582 CA
Self-reported in NPPES; status is on the state search - Practice location
- 795 EL Camino Real, Palo Alto, CA 94301
- Phone
- (650) 321-4121
- Enumerated
- Jul 20, 2007
- Record last updated
- May 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101210000994); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 795 EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amy Adams, M.D.Dermatology Physician1679643928
- William Adams, DPMFoot & Ankle Surgery Podiatrist1447487830
Verify Anne Margaret Porzig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A99582Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,070 Medicare Part D claims for 178 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Levothyroxine Sodium172 claims
- Alendronate Sodium168 claims
- Metformin Hcl Er61 claims
- Jardiance55 claims
- Atorvastatin Calcium51 claims
- Metformin Hcl42 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.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationMountain View, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anne Margaret Porzig among 1,131 endocrinology, diabetes & metabolism physician records in California
Anne Margaret Porzig, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 42% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2005 · median 2003 among the 779 with a school on file
- Record last updated2020 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Palo Alto → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Grace Chan, MDPalo Alto, CA 943011023027729
- Carol Clewans, M.D.Palo Alto, CA 943011629080122
- Nandini Joseph, MDPalo Alto, CA 943011912137878
- Norra Kwong, M.D.Palo Alto, CA 943011689840415
- Randolph LindePalo Alto, CA 943011669484127
- Daniele Rottkamp, MDPalo Alto, CA 943011740492925
- Swaytha Yalamanchi, MDPalo Alto, CA 943011649596180
- Kaniksha Desai, MDPalo Alto, CA 943041316266778
Common questions
What is Anne Margaret Porzig, M.D.'s NPI number?
Anne Margaret Porzig, M.D.'s National Provider Identifier (NPI) is 1144420902, issued on Jul 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Anne Margaret Porzig, M.D. located?
The NPPES record lists a practice address at 795 EL Camino Real, Palo Alto, CA, 94301. Phone: (650) 321-4121. Providers update this record themselves, so call before visiting.
How can I verify Anne Margaret Porzig, M.D.'s license?
NPPES lists California license number A99582, 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 Anne Margaret Porzig, M.D. prescribe under Medicare Part D?
In 2024, Anne Margaret Porzig, M.D. had 1,070 Medicare Part D claims for 178 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.