Gretchen Perilli, MD
Endocrinology, Diabetes & Metabolism Physician · Allentown, PA
Gretchen Perilli, MD is an endocrinology, diabetes & metabolism physician with a practice address in Allentown, Pennsylvania, and NPI 1043306343, issued on Oct 5, 2006. Check the license (Pennsylvania MD422829, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Gretchen Perilli
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- MD422829 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1243 S Cedar Crest Blvd, Allentown, PA 18103
- Phone
- (610) 402-6790
- Enumerated
- Oct 5, 2006
- Record last updated
- Mar 1, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060504000212); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 485 in Pennsylvania → Look up another NPI →
Also registered at 1243 S Cedar Crest Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Laurie Baker, RDRegistered Dietitian1336566389
- Elliot BeadleRegistered Dietitian1306217609
- Kathryn Boardman, RDRegistered Dietitian1861766875
- Donna Boden, RDRegistered Dietitian1154507986
- Charles Bonos, M.D.Occupational Medicine Physician1992892921
Verify Gretchen Perilli in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD422829Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,317 Medicare Part D claims for 204 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Levothyroxine Sodium205 claims
- Ozempic92 claims
- Synthroid81 claims
- Mounjaro69 claims
- Atorvastatin Calcium64 claims
- Metformin Hcl60 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
- Lehigh Valley Physician GroupAllentown, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gretchen Perilli among 485 endocrinology, diabetes & metabolism physician records in Pennsylvania
Gretchen Perilli, MD is one of 485 endocrinology, diabetes & metabolism physician records with a practice address in Pennsylvania. 84% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 59% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2001 · median 2004 among the 334 with a school on file
- Record last updated2016 · 62% 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 Pennsylvania 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 Pennsylvania
There are 485 endocrinology, diabetes & metabolism physician records in Pennsylvania.
All 485 in Pennsylvania → Every provider in Allentown → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Aakif Ahmad, DOAllentown, PA 181031720308331
- Andrew Brackbill, M.D.Allentown, PA 181031447455209
- Robert Doll, M.D.Allentown, PA 181031043203375
- Mal Homan, MDAllentown, PA 181031215905898
- Sharmila Koshy, MDAllentown, PA 181031609037696
- Ya-Yu Lee, MDAllentown, PA 181031235271545
- Angela Magdaleno, D.O.Allentown, PA 181031720475189
- Robert McCauley, M.D.Allentown, PA 181031992920466
Common questions
What is Gretchen Perilli, MD's NPI number?
Gretchen Perilli, MD's National Provider Identifier (NPI) is 1043306343, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen Perilli, MD located?
The NPPES record lists a practice address at 1243 S Cedar Crest Blvd, Allentown, PA, 18103. Phone: (610) 402-6790. Providers update this record themselves, so call before visiting.
How can I verify Gretchen Perilli, MD's license?
NPPES lists Pennsylvania license number MD422829, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gretchen Perilli, MD prescribe under Medicare Part D?
In 2024, Gretchen Perilli, MD had 1,317 Medicare Part D claims for 204 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.
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.