David Chappell, M.D.
NPI 1598732463 · Endocrinology, Diabetes & Metabolism Physician · Petaluma, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Chappell, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Petaluma, CA (NPI 1598732463).
Provider details
- NPI number
- 1598732463
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C40326 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
2,204 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 803 | $99 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 505 | $139 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 382 | $9 |
| Urinalysis, Manual Test81002 | 300 | $3 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 77 | $16 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 82 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tirzepatidebrand: Mounjaro | 216 | 28 |
| Potassium Chloride | 215 | 54 |
| Levothyroxine Sodium | 214 | 49 |
| Atorvastatin Calcium | 125 | 35 |
| Rosuvastatin Calcium | 95 | 26 |
| Empagliflozinbrand: Jardiance | 89 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,791 across 74 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
- 2006-03-01
- Last updated
- 2010-07-16
Frequently asked questions
- What is David Chappell's NPI number?
- David Chappell's National Provider Identifier (NPI) is 1598732463, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Chappell's specialty?
- David Chappell is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is David Chappell located?
- David Chappell's practice location on file with NPPES is 141 Lynch Creek Way, Petaluma, CA 94954.
- What is David Chappell's phone number?
- The practice phone number listed in the NPPES registry for David Chappell is (707) 762-0001.
- Does David Chappell accept Medicare?
- David Chappell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Chappell's NPI active?
- Yes — David Chappell's NPI (1598732463) is active in the NPPES registry as of the last update on 2010-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.