Karen Parker, M.D
NPI 1548200546 · Emergency Medicine Physician · Marysville, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Parker, M.D is a Emergency Medicine Physician provider in Marysville, CA (NPI 1548200546).
Provider details
- NPI number
- 1548200546
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Female
- Sole proprietor
- No
- License
- G78555 (CA)
Specialties & taxonomies
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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Methylphenidate Hcl | 37 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphet Er | 26 |
| Bupropion Hclbrand: Bupropion Xl | 23 |
| Guanfacine Hclbrand: Guanfacine Hcl Er | 22 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 17 |
| Duloxetine Hcl | 15 |
| Mirtazapine | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2021-12-06
Frequently asked questions
- What is Karen Parker's NPI number?
- Karen Parker's National Provider Identifier (NPI) is 1548200546, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Parker's specialty?
- Karen Parker is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Parker located?
- Karen Parker's practice location on file with NPPES is 726 4th St, Marysville, CA 95901-5656.
- What is Karen Parker's phone number?
- The practice phone number listed in the NPPES registry for Karen Parker is (530) 749-4300.
- Does Karen Parker accept Medicare?
- Karen Parker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Parker's NPI active?
- Yes — Karen Parker's NPI (1548200546) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.