Gretchen Leffler, PAC
NPI 1255457677 · Physician Assistant · Kalamazoo, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Leffler, PAC is a Physician Assistant provider in Kalamazoo, MI (NPI 1255457677).
Provider details
- NPI number
- 1255457677
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Female
- Sole proprietor
- No
- License
- 5601004107 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
172 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 135 | $80 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 25 | $105 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 12 | $118 |
Typical Medicare-allowed amounts for these services range $80–$118 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 98 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 306 | 81 |
| Atorvastatin Calcium | 275 | 73 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 178 | 40 |
| Omeprazole | 160 | 46 |
| Amlodipine Besylate | 156 | 45 |
| Metoprolol Succinate | 150 | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$494 across 22 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-21
- Last updated
- 2023-11-27
- Certified
- 2020-10-05
Frequently asked questions
- What is Gretchen Leffler's NPI number?
- Gretchen Leffler's National Provider Identifier (NPI) is 1255457677, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Leffler's specialty?
- Gretchen Leffler is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gretchen Leffler located?
- Gretchen Leffler's practice location on file with NPPES is 5629 Stadium Drive, Kalamazoo, MI 49009-1952.
- What is Gretchen Leffler's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Leffler is (269) 372-5701.
- Does Gretchen Leffler accept Medicare?
- Gretchen Leffler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Leffler's NPI active?
- Yes — Gretchen Leffler's NPI (1255457677) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.