NPPES file of Aug 9, 2026

Stephen Y.p. Shen, M.D.

Adolescent Medicine (Internal Medicine) Physician · San Diego, CA

Stephen Y.p. Shen, M.D. is an adolescent medicine (internal medicine) physician with a practice address in San Diego, California, and NPI 1396839726, issued on Oct 2, 2006. Check the license (California A70873, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1396839726
Name
Stephen Y.p. Shen
Credential
M.D.
Primary taxonomy
Adolescent Medicine (Internal Medicine) Physician 207RA0000X
License number
A70873 CA
Self-reported in NPPES; status is on the state search
Practice location
8765 Aero Drive, San Diego, CA 92123
Phone
(858) 541-0181
Enumerated
Oct 2, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(858) 430-0919
Medicare enrollment
Enrolled (PECOS I20040210001161); accepts Medicare assignment
Medical or professional school
West Virginia University School Of Medicine, 1998
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest adolescent medicine (internal medicine) physician records → All 30 in California → Look up another NPI →

Also registered at 8765 Aero Drive

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Katie Byrne, PSY.D.Psychologist1629391123
  2. Arthur Lovgren-Moritz, M.D.Internal Medicine Physician1992726095
  3. Kenneth Roth, M.D.Internal Medicine Physician1750475562

Verify Stephen Y.p. Shen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A70873    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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88% fewer Medicare Part D claims than the average adolescent medicine (internal medicine) physician in 2024

449 Medicare Part D claims for 200 beneficiaries, against an average of 3,639 among the 177 providers of this specialty who prescribed in Part D. 43 claims were for opioids.

  1. Stephen Shen449
  2. Specialty average3,639

Most prescribed

  1. Amoxicillin-Clavulanate Potass26 claims
  2. Tramadol Hcl23 claims
  3. Cephalexin18 claims
  4. Atorvastatin Calcium16 claims
  5. Prednisone16 claims
  6. Bumetanide14 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 2 group practices

  1. Emergency And Acute Care Medical CorporationSan Diego, CA
  2. Focus ON Health IncSan Diego, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Stephen Y.p. Shen among 30 adolescent medicine (internal medicine) physician records in California

Stephen Y.p. Shen, M.D. is one of 30 adolescent medicine (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 3% of them.

  • NPI issued2006 · 3% of these records are older, 47% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 40% of these records are
  • Graduated1998 · median 2003 among the 12 with a school on file
  • Record last updated2007 · 70% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adolescent Medicine (Internal Medicine) Physician providers in California

There are 30 adolescent medicine (internal medicine) physician records in California.

All 30 in California → Every provider in San Diego → Adolescent Medicine (Internal Medicine) Physician nationwide →

The 8 adolescent medicine (internal medicine) physician records with the nearest ZIP codes

  1. Hossain Ronaghy, M.D.San Diego, CA 921091386670438
  2. Hoang Dong, MDSan Diego, CA 921031841473154
  3. Brian Murray, M.D.La Jolla, CA 920931194888495
  4. Venu Prabaker, M.D.La Mesa, CA 919411467401042
  5. Venkatappa Padmanabha, M.D FACPBarstow, CA 923111710946843
  6. Duc Nguyen, M.D.Rosemead, CA 917701518992544
  7. Sina Bakhshaei, M.D.Temecula, CA 925921285253237
  8. Barton Billeci, MDIrvine, CA 926041154407237

Common questions

What is Stephen Y.p. Shen, M.D.'s NPI number?

Stephen Y.p. Shen, M.D.'s National Provider Identifier (NPI) is 1396839726, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Y.p. Shen, M.D. located?

The NPPES record lists a practice address at 8765 Aero Drive, San Diego, CA, 92123. Phone: (858) 541-0181. Providers update this record themselves, so call before visiting.

How can I verify Stephen Y.p. Shen, M.D.'s license?

NPPES lists California license number A70873, 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 Y.p. Shen, M.D. prescribe under Medicare Part D?

In 2024, Stephen Y.p. Shen, M.D. had 449 Medicare Part D claims for 200 beneficiaries; the average among adolescent medicine (internal medicine) physician prescribers was 3,639. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.