Christopher Dunham, M.D.
NPI 1639193659 · Psychiatry Physician · Chico, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Dunham, M.D. is a Psychiatry Physician provider in Chico, CA (NPI 1639193659).
Provider details
- NPI number
- 1639193659
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD042185L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 49 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Olanzapine | 205 | 20 |
| Sertraline Hcl | 135 | 12 |
| Gabapentin | 125 | 16 |
| Risperidone | 116 | 12 |
| Benztropine Mesylate | 111 | 14 |
| Divalproex Sodium | 110 | 13 |
| Quetiapine Fumarate | 109 | — |
| Trazodone Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2025-07-31
- Certified
- 2025-07-31
Frequently asked questions
- What is Christopher Dunham's NPI number?
- Christopher Dunham's National Provider Identifier (NPI) is 1639193659, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Dunham's specialty?
- Christopher Dunham is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Christopher Dunham located?
- Christopher Dunham's practice location on file with NPPES is 560 Cohasset Rd Ste 175, Chico, CA 95926-2460.
- What is Christopher Dunham's phone number?
- The practice phone number listed in the NPPES registry for Christopher Dunham is (530) 891-2810.
- Does Christopher Dunham accept Medicare?
- Christopher Dunham is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Dunham's NPI active?
- Yes — Christopher Dunham's NPI (1639193659) is active in the NPPES registry as of the last update on 2025-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.