John Robert Nienow, MD
Infectious Disease Physician · San Francisco, CA
John Robert Nienow, MD is an infectious disease physician with a practice address in San Francisco, California, and NPI 1861472649, issued on Jan 18, 2006. Check the license (California 00G795490, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Robert Nienow
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 00G795490 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2186 Geary Blvd Ste 314, San Francisco, CA 94115
- Phone
- (415) 202-1550
- Enumerated
- Jan 18, 2006
- Record last updated
- May 6, 2025
- Fax
- (415) 776-8233
- Medicare enrollment
- Enrolled (PECOS I20040914001378); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 2186 Geary Blvd Ste 314
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gerald Roberts, M.D.Gastroenterology Physician1982670220
Verify John Robert Nienow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00G795490Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15.7 times the Medicare Part D claims of the average infectious disease physician in 2024
10,815 Medicare Part D claims for 392 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims. 342 claims were for opioids.
Most prescribed
- Biktarvy680 claims
- Atorvastatin Calcium603 claims
- Bupropion Xl270 claims
- Tamsulosin Hcl252 claims
- Gabapentin250 claims
- Descovy224 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.
Industry payments in 2024: $6,531.79
81 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John Robert Nienow among 1,119 infectious disease physician records in California
John Robert Nienow, MD is one of 1,119 infectious disease physician records with a practice address in California. 79% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1988 · median 2003 among the 735 with a school on file
- Record last updated2025 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in San Francisco → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- David Busch, M.D.San Francisco, CA 941151942343975
- Andrew FaulkSan Francisco, CA 941151598224222
- Shelley Gordon, M.D.San Francisco, CA 941151841334521
- Erin Hsu, M.D.San Francisco, CA 941151366481509
- Joel Palefsky, MDSan Francisco, CA 941151336191345
- Lory Wiviott, M.D.San Francisco, CA 941151548395437
- Stephen Cohen, MDSan Francisco, CA 941161003241878
- Lisa DanzigSan Francisco, CA 941141497489629
Common questions
What is John Robert Nienow, MD's NPI number?
John Robert Nienow, MD's National Provider Identifier (NPI) is 1861472649, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Robert Nienow, MD located?
The NPPES record lists a practice address at 2186 Geary Blvd Ste 314, San Francisco, CA, 94115. Phone: (415) 202-1550. Providers update this record themselves, so call before visiting.
How can I verify John Robert Nienow, MD's license?
NPPES lists California license number 00G795490, 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 John Robert Nienow, MD prescribe under Medicare Part D?
In 2024, John Robert Nienow, MD had 10,815 Medicare Part D claims for 392 beneficiaries; the average among infectious disease physician prescribers was 689. 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.