What is Sierra Cobb's NPI number?

Sierra Cobb's National Provider Identifier (NPI) is 1538609623, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sierra Cobb's specialty?

Sierra Cobb is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).

Where is Sierra Cobb located?

Sierra Cobb's practice location on file with NPPES is 1101 26th St S, Great Falls, MT 59405-5161.

What is Sierra Cobb's phone number?

The practice phone number listed in the NPPES registry for Sierra Cobb is (406) 731-8888.

Does Sierra Cobb accept Medicare?

Sierra Cobb is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Sierra Cobb's NPI active?

Yes — Sierra Cobb's NPI (1538609623) is active in the NPPES registry as of the last update on 2024-04-08.

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Sierra Cobb

NPI 1538609623 · Hospitalist Physician · Great Falls, MT

Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Sierra Cobb is a Hospitalist Physician provider in Great Falls, MT (NPI 1538609623).

Provider details

NPI number: 1538609623
Entity type: Individual
Primary specialty: Hospitalist PhysicianAllopathic & Osteopathic Physicians
Sex: Female
Sole proprietor: No
License: 81289 (MT)

Specialties & taxonomies

Hospitalist PhysicianPrimary208M00000XLicense 81289 (MT)
Allopathic & Osteopathic Physicians
Family Medicine Physician207Q00000XLicense 81289 (MT)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(59/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
9 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
344 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)
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	174	$75
Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231	68	$45
Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222	37	$124
Hospital Discharge Day Management, More Than 30 Minutes99239	37	$105
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	28	$169

Typical Medicare-allowed amounts for these services range $45–$169 (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.

Practice location

1101 26th St S

Great Falls, MT 59405-5161

Phone: (406) 731-8888

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Mailing address