Eric Holtrop, M.D.
NPI 1881790459 · Internal Medicine Physician · Grass Valley, CA
Eric Holtrop, M.D. is a Internal Medicine Physician provider in Grass Valley, CA (NPI 1881790459).
Provider details
- NPI number
- 1881790459
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A72244 (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
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 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 119 | 36 |
| Levothyroxine Sodium | 85 | 24 |
| Prednisone | 79 | 35 |
| Azithromycin | 67 | 46 |
| Ibandronate Sodium | 63 | 22 |
| Tamsulosin Hcl | 62 | 19 |
| Losartan Potassium | 55 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2016-08-05
Frequently asked questions
- What is Eric Holtrop's NPI number?
- Eric Holtrop's National Provider Identifier (NPI) is 1881790459, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eric Holtrop's specialty?
- Eric Holtrop is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eric Holtrop located?
- Eric Holtrop's practice location on file with NPPES is 280 Sierra College Dr, Grass Valley, CA 95945-5763.
- What is Eric Holtrop's phone number?
- The practice phone number listed in the NPPES registry for Eric Holtrop is (530) 477-4480.
- Is Eric Holtrop's NPI active?
- Yes — Eric Holtrop's NPI (1881790459) is active in the NPPES registry as of the last update on 2016-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.