NPPES file of Aug 9, 2026

Josefina Diaz Shen, M.D.

Endocrinology, Diabetes & Metabolism Physician · Grand Rapids, MI

Josefina Diaz Shen, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Grand Rapids, Michigan, and NPI 1477726917, issued on Apr 4, 2008. Check the license (Michigan 4301101073, as entered in NPPES) on the Michigan Board of Medicine (LARA); 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
1477726917
Name
Josefina Diaz Shen
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License numbers
4301101073 MI
036117976 IL
Self-reported in NPPES; status is on the state search
Practice location
300 Lafayette Ave SE, Grand Rapids, MI 49503
Phone
(616) 685-3098
Enumerated
Apr 4, 2008
Record last updated
Jul 6, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(616) 685-3095
Medicare enrollment
Enrolled (PECOS I20120831000427); accepts Medicare assignment
Medical or professional school
Michigan State University College Of Human Medicine, 2004
Telehealth
Offers telehealth (CMS)
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 endocrinology, diabetes & metabolism physician records → All 270 in Michigan → Look up another NPI →

Also registered at 300 Lafayette Ave SE

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

  1. Nicole Abbgy, NPAdult Health Nurse Practitioner1144774019
  2. Nabeel Ahmad, M.DFamily Medicine Physician1962842187
  3. Kevin Ali, M.DFamily Medicine Physician1588812952
  4. Steven Ashmead, MDFamily Medicine Physician1710931704
  5. Maha Ayashi, MDFamily Medicine Physician1134257694
  6. Jody Banister, MDInternal Medicine Physician1881647501

Verify Josefina Diaz Shen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301101073    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 Michigan license search

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31% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024

1,824 Medicare Part D claims for 344 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 51% of claims.

  1. Josefina Shen1,824
  2. Specialty average2,630

Most prescribed

  1. Levothyroxine Sodium573 claims
  2. Synthroid80 claims
  3. Methimazole72 claims
  4. Lantus Solostar64 claims
  5. Trulicity53 claims
  6. Ozempic52 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

  1. Advantage Health/saint Mary's Medical GroupCaledonia, MI

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

Josefina Diaz Shen among 270 endocrinology, diabetes & metabolism physician records in Michigan

Josefina Diaz Shen, M.D. is one of 270 endocrinology, diabetes & metabolism physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 54% of them.

  • NPI issued2008 · 54% of these records are older, 40% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated2004 · median 2004 among the 195 with a school on file
  • Record last updated2012 · 60% 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 Michigan 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 Michigan

There are 270 endocrinology, diabetes & metabolism physician records in Michigan.

All 270 in Michigan → Every provider in Grand Rapids → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Ruggero Battan, MDGrand Rapids, MI 495031134150147
  2. Emilie Collins, MDGrand Rapids, MI 495031104942085
  3. Gregory Deines, DOGrand Rapids, MI 495031427098532
  4. Cyprian Gardine, MDGrand Rapids, MI 495031659583888
  5. Mohammad Kawji, MD, CCDGrand Rapids, MI 495031811151426
  6. Heather Klingeman, MDGrand Rapids, MI 495031295174076
  7. Edward Kryshak, MDGrand Rapids, MI 495031912948233
  8. Scott Mazurek, DOGrand Rapids, MI 495031407272081

Common questions

What is Josefina Diaz Shen, M.D.'s NPI number?

Josefina Diaz Shen, M.D.'s National Provider Identifier (NPI) is 1477726917, issued on Apr 4, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Josefina Diaz Shen, M.D. located?

The NPPES record lists a practice address at 300 Lafayette Ave SE, Grand Rapids, MI, 49503. Phone: (616) 685-3098. Providers update this record themselves, so call before visiting.

How can I verify Josefina Diaz Shen, M.D.'s license?

NPPES lists Michigan license number 4301101073, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Josefina Diaz Shen, M.D. prescribe under Medicare Part D?

In 2024, Josefina Diaz Shen, M.D. had 1,824 Medicare Part D claims for 344 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.

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.