Karen Hopp, MD
NPI 1831180975 · Psychiatry Physician · Woodland, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Hopp, MD is a Psychiatry Physician provider in Woodland, CA (NPI 1831180975).
Provider details
- NPI number
- 1831180975
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A84575 (CA)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
233 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 123 | $141 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 78 | $77 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 32 | $198 |
Typical Medicare-allowed amounts for these services range $77–$198 (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 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lamotrigine | 181 | 23 |
| Aripiprazole | 99 | 13 |
| Sertraline Hcl | 91 | 11 |
| Clonazepam | 78 | — |
| Buspirone Hcl | 69 | — |
| Fluoxetine Hcl | 65 | — |
| Trazodone Hcl | 60 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-28
- Last updated
- 2017-05-25
Frequently asked questions
- What is Karen Hopp's NPI number?
- Karen Hopp's National Provider Identifier (NPI) is 1831180975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Hopp's specialty?
- Karen Hopp is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Hopp located?
- Karen Hopp's practice location on file with NPPES is 1207 Fairchild Ct, Woodland, CA 95695-4321.
- What is Karen Hopp's phone number?
- The practice phone number listed in the NPPES registry for Karen Hopp is (530) 668-2600.
- Does Karen Hopp accept Medicare?
- Karen Hopp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Hopp's NPI active?
- Yes — Karen Hopp's NPI (1831180975) is active in the NPPES registry as of the last update on 2017-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.