Earl Book, M.D.
NPI 1265433700 · Family Medicine Physician · Helena, MT
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Earl Book, M.D. is a Family Medicine Physician provider in Helena, MT (NPI 1265433700).
Provider details
- NPI number
- 1265433700
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 5316 (MT)
Specialties & taxonomies
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
559 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 | 277 | $126 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 149 | $89 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 82 | $176 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 40 | $8 |
| Administration of Vaccine90471 | 11 | $20 |
Typical Medicare-allowed amounts for these services range $8–$176 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 88 | 84 |
| Prednisone | 75 | 70 |
| Cefuroxime Axetilbrand: Cefuroxime | 37 | 35 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 31 | 26 |
| Cefdinir | 26 | 25 |
| Azithromycin | 22 | 19 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-09
- Last updated
- 2017-03-08
Frequently asked questions
- What is Earl Book's NPI number?
- Earl Book's National Provider Identifier (NPI) is 1265433700, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Earl Book's specialty?
- Earl Book is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Earl Book located?
- Earl Book's practice location on file with NPPES is 3330 Ptarmigan Ln, Helena, MT 59602-0521.
- What is Earl Book's phone number?
- The practice phone number listed in the NPPES registry for Earl Book is (406) 457-4180.
- Does Earl Book accept Medicare?
- Earl Book is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Earl Book's NPI active?
- Yes — Earl Book's NPI (1265433700) is active in the NPPES registry as of the last update on 2017-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.