Gretchen Perilli, MD
NPI 1043306343 · Endocrinology, Diabetes & Metabolism Physician · Allentown, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Perilli, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Allentown, PA (NPI 1043306343).
Provider details
- NPI number
- 1043306343
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD422829 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
755 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 229 | $72 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 223 | $119 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 131 | $32 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 85 | $118 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 68 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 205 | 61 |
| Semaglutidebrand: Ozempic | 92 | 22 |
| Levothyroxine Sodiumbrand: Synthroid | 81 | 20 |
| Tirzepatidebrand: Mounjaro | 69 | 16 |
| Atorvastatin Calcium | 64 | 23 |
| Metformin Hcl | 60 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-05
- Last updated
- 2016-03-01
Frequently asked questions
- What is Gretchen Perilli's NPI number?
- Gretchen Perilli's National Provider Identifier (NPI) is 1043306343, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Perilli's specialty?
- Gretchen Perilli is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Gretchen Perilli located?
- Gretchen Perilli's practice location on file with NPPES is 1243 S Cedar Crest Blvd, Allentown, PA 18103-6268.
- What is Gretchen Perilli's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Perilli is (610) 402-6790.
- Does Gretchen Perilli accept Medicare?
- Gretchen Perilli is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Perilli's NPI active?
- Yes — Gretchen Perilli's NPI (1043306343) is active in the NPPES registry as of the last update on 2016-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.