Stephen Mears Nagy, MD
Allergy & Immunology (Internal Medicine) Physician · Sacramento, CA
Stephen Mears Nagy, MD is an allergy & immunology (internal medicine) physician with a practice address in Sacramento, California, and NPI 1013929967, issued on Aug 12, 2006. Check the license (California G14269, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Mears Nagy
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License number
- G14269 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4801 J St, Sacramento, CA 95819
- Phone
- (916) 456-4782
- Enumerated
- Aug 12, 2006
- Record last updated
- Nov 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (591) 645-6827
- Entity
- Type 1 · individual
8 nearest allergy & immunology (internal medicine) physician records → All 81 in California → Look up another NPI →
Also registered at 4801 J St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Cloninger, M.D.Clinical & Laboratory Immunology (Allergy & Immunology) Physician1114903457
- Jessica Maloh, NDNaturopath1497484836
- Catherine Nagy, MDAllergy Physician1477656817
- Terry Pachter, DMDGeneral Practice Dentistry1578659686
Verify Stephen Mears Nagy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G14269Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average allergy & immunology (internal medicine) physician in 2024
77 Medicare Part D claims, against an average of 789 among the 429 providers of this specialty who prescribed in Part D.
Most prescribed
- Pravastatin Sodium11 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.
Stephen Mears Nagy among 81 allergy & immunology (internal medicine) physician records in California
Stephen Mears Nagy, MD is one of 81 allergy & immunology (internal medicine) physician records with a practice address in California. 67% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 68% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2012 · 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 207RA0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology (Internal Medicine) Physician providers in California
There are 81 allergy & immunology (internal medicine) physician records in California.
All 81 in California → Every provider in Sacramento → Allergy & Immunology (Internal Medicine) Physician nationwide →
The 8 allergy & immunology (internal medicine) physician records with the nearest ZIP codes
- Fatima Ali, MDSacramento, CA 958171093045023
- Anna CherianSacramento, CA 958171215672738
- Christine LicataSacramento, CA 958251437619533
- Jay Keystone, M.D.Vacaville, CA 956881306115001
- Bruce Ryhal, MDRoseville, CA 956781902812795
- Rosemary Hallett, M.D.Davis, CA 956161376527804
- Aminaa SiddiqiDavis, CA 956161619363314
- Suzanne Teuber, M.D.Davis, CA 956161619950516
Common questions
What is Stephen Mears Nagy, MD's NPI number?
Stephen Mears Nagy, MD's National Provider Identifier (NPI) is 1013929967, issued on Aug 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Mears Nagy, MD located?
The NPPES record lists a practice address at 4801 J St, Sacramento, CA, 95819. Phone: (916) 456-4782. Providers update this record themselves, so call before visiting.
How can I verify Stephen Mears Nagy, MD's license?
NPPES lists California license number G14269, 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 Stephen Mears Nagy, MD prescribe under Medicare Part D?
In 2024, Stephen Mears Nagy, MD had 77 Medicare Part D claims; the average among allergy & immunology (internal medicine) physician prescribers was 789. 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.