Zeferino Arroyo, D.O.
NPI 1285601096 · Anesthesiology Physician · Billings, MT
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zeferino Arroyo, D.O. is a Anesthesiology Physician provider in Billings, MT (NPI 1285601096).
Provider details
- NPI number
- 1285601096
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 10380 (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
63 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) |
|---|---|---|
| Injection of Anesthetic Agent And/Or Steroid Into Arm Nerve Bundle (brachial Plexus)64415 | 24 | $67 |
| Anesthesia for Other Procedure on Top of Arm Bone and Shoulder Joint01630 | 14 | $237 |
| Anesthesia for Open Or Endoscopic Total Shoulder Joint Replacement01638 | 13 | $399 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 12 | $97 |
Typical Medicare-allowed amounts for these services range $67–$399 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-01
- Last updated
- 2010-07-08
Frequently asked questions
- What is Zeferino Arroyo's NPI number?
- Zeferino Arroyo's National Provider Identifier (NPI) is 1285601096, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zeferino Arroyo's specialty?
- Zeferino Arroyo is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Zeferino Arroyo located?
- Zeferino Arroyo's practice location on file with NPPES is 1233 N 30th St, Billings, MT 59101-0127.
- What is Zeferino Arroyo's phone number?
- The practice phone number listed in the NPPES registry for Zeferino Arroyo is (406) 254-0707.
- Does Zeferino Arroyo accept Medicare?
- Zeferino Arroyo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zeferino Arroyo's NPI active?
- Yes — Zeferino Arroyo's NPI (1285601096) is active in the NPPES registry as of the last update on 2010-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.