Nathaniel Woodruff, M.D., PHD, FACC
NPI 1275623191 · Cardiovascular Disease Physician · Grass Valley, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Woodruff, M.D., PHD, FACC is a Cardiovascular Disease Physician provider in Grass Valley, CA (NPI 1275623191).
Provider details
- NPI number
- 1275623191
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PHD, FACC
- Sex
- Male
- Sole proprietor
- Yes
- License
- C55840 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
696 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 125 | $15 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 123 | $113 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 114 | $187 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 86 | $133 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Tracing93005 | 58 | $7 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 157 | 74 |
| Metoprolol Succinate | 110 | 57 |
| Furosemide | 76 | 31 |
| Apixabanbrand: Eliquis | 63 | 22 |
| Rosuvastatin Calcium | 57 | 29 |
| Amlodipine Besylate | 49 | 23 |
| Isosorbide Mononitrate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-13
- Last updated
- 2019-02-26
Frequently asked questions
- What is Nathaniel Woodruff's NPI number?
- Nathaniel Woodruff's National Provider Identifier (NPI) is 1275623191, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Woodruff's specialty?
- Nathaniel Woodruff is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Woodruff located?
- Nathaniel Woodruff's practice location on file with NPPES is 150 Catherine Ln Ste F, Grass Valley, CA 95945-5719.
- What is Nathaniel Woodruff's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Woodruff is (530) 477-8358.
- Does Nathaniel Woodruff accept Medicare?
- Nathaniel Woodruff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Woodruff's NPI active?
- Yes — Nathaniel Woodruff's NPI (1275623191) is active in the NPPES registry as of the last update on 2019-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.