Pennapa Chan, MD
NPI 1457405128 · Endocrinology, Diabetes & Metabolism Physician · Madison, WI
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Pennapa Chan, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Madison, WI (NPI 1457405128).
Provider details
- NPI number
- 1457405128
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD212597 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
32 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 21 | $163 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 11 | $113 |
Typical Medicare-allowed amounts for these services range $113–$163 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 78 | 29 |
| Semaglutidebrand: Ozempic | 23 | — |
| Methimazole | 17 | — |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 17 | — |
| Levothyroxine Sodiumbrand: Synthroid | 16 | — |
| Metformin Hclbrand: Metformin Hcl Er | 15 | — |
Practice location
Mailing address
Additional practice locations (2)
- 3377 Riverbend DrSpringfield, OR 97477-8803Phone: (458) 205-6543Fax: (458) 205-6492
- 1313 Fish Hatchery RdMadison, WI 53715-1911Phone: (608) 252-8000Fax: (608) 252-8268
Registry dates
- Enumerated
- 2007-01-22
- Last updated
- 2024-12-16
- Certified
- 2024-12-16
Frequently asked questions
- What is Pennapa Chan's NPI number?
- Pennapa Chan's National Provider Identifier (NPI) is 1457405128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Pennapa Chan's specialty?
- Pennapa Chan is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Pennapa Chan located?
- Pennapa Chan's practice location on file with NPPES is 451 Junction Rd, Madison, WI 53717-2656.
- What is Pennapa Chan's phone number?
- The practice phone number listed in the NPPES registry for Pennapa Chan is (608) 263-5010.
- Does Pennapa Chan accept Medicare?
- Pennapa Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Pennapa Chan's NPI active?
- Yes — Pennapa Chan's NPI (1457405128) is active in the NPPES registry as of the last update on 2024-12-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.