Charles Barton, M.D.
NPI 1881688505 · Psychiatry Physician · Fremont, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Barton, M.D. is a Psychiatry Physician provider in Fremont, CA (NPI 1881688505).
Provider details
- NPI number
- 1881688505
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D41236 (MD)
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
20 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 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Escitalopram Oxalate | 65 | 20 |
| Trazodone Hcl | 63 | 22 |
| Gabapentin | 48 | 14 |
| Bupropion Hclbrand: Bupropion Xl | 47 | 16 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 44 | 12 |
| Quetiapine Fumarate | 37 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-08
- Last updated
- 2021-12-17
Frequently asked questions
- What is Charles Barton's NPI number?
- Charles Barton's National Provider Identifier (NPI) is 1881688505, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Barton's specialty?
- Charles Barton is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Barton located?
- Charles Barton's practice location on file with NPPES is 39650 Liberty St, Fremont, CA 94538-2223.
- What is Charles Barton's phone number?
- The practice phone number listed in the NPPES registry for Charles Barton is (510) 498-2890.
- Does Charles Barton accept Medicare?
- Charles Barton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Barton's NPI active?
- Yes — Charles Barton's NPI (1881688505) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.