Mark Grant Shapiro, MD
Hospitalist Physician · San Diego, CA
Mark Grant Shapiro, MD is a hospitalist physician with a practice address in San Diego, California, and NPI 1336251446, issued on Aug 31, 2006. Check the license (California A91772, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Grant Shapiro
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A91772 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7901 Frost St, San Diego, CA 92123
- Phone
- (858) 939-3400
- Enumerated
- Aug 31, 2006
- Record last updated
- Dec 16, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- 00A917720 CA
- Medicare enrollment
- Enrolled (PECOS I20070714000254); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 7901 Frost St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aileen Afshar, MDInternal Medicine Physician1134689946
- Saad Alkhider, MDInternal Medicine Physician1447712062
- Mustafa Alwash, M.DHospitalist Physician1679936439
- Alexandra Anjier, MDEmergency Medicine Physician1467087510
- Anna Astashchanka, MDPulmonary Disease Physician1821594359
- Amir Bahreman, M.D.Internal Medicine Physician1124249388
Verify Mark Grant Shapiro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A91772Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average hospitalist physician in 2024
357 Medicare Part D claims for 127 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 30 claims were for opioids.
Most prescribed
- Ondansetron Odt26 claims
- Amoxicillin-Clavulanate Potass22 claims
- Furosemide17 claims
- Atorvastatin Calcium15 claims
- Oxycodone Hcl14 claims
- Hydrocodone-Acetaminophen12 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: $97.12
1 payment: food and beverage; the largest payer was Bard Peripheral Vascular, Inc. The 7,324 providers of this specialty with any payment received $494.84 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.
Bills Medicare through one group practice
- Providence Medical FoundationSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Grant Shapiro among 3,099 hospitalist physician records in California
Mark Grant Shapiro, MD is one of 3,099 hospitalist physician records with a practice address in California. 90% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2003 · median 2010 among the 2,505 with a school on file
- Record last updated2014 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in San Diego → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Kalpana Chalasani, M.D.San Diego, CA 921231467560920
- Trung Dang, M.D.San Diego, CA 921231275543670
- Brent Drouin, M.D.San Diego, CA 921231356351555
- Yevgeniy Grobman, MDSan Diego, CA 921231295050243
- Robert Holmes, MDSan Diego, CA 921231962493841
- Arturo Lara Llerena, MDSan Diego, CA 921231538501721
- Brian Lichtenstein, M.D.San Diego, CA 921231205142908
- Ton Ngo, MDSan Diego, CA 921231427007988
Common questions
What is Mark Grant Shapiro, MD's NPI number?
Mark Grant Shapiro, MD's National Provider Identifier (NPI) is 1336251446, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Grant Shapiro, MD located?
The NPPES record lists a practice address at 7901 Frost St, San Diego, CA, 92123. Phone: (858) 939-3400. Providers update this record themselves, so call before visiting.
How can I verify Mark Grant Shapiro, MD's license?
NPPES lists California license number A91772, 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 Mark Grant Shapiro, MD prescribe under Medicare Part D?
In 2024, Mark Grant Shapiro, MD had 357 Medicare Part D claims for 127 beneficiaries; the average among hospitalist physician prescribers was 521. 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.