2026 NPPES data Pharmacist NPI 1770945727 PHARM.D.
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SPENCER BELLEW, PHARM.D.

Pharmacist in BILLINGS, Montana. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
325
Medicare Part D claims · 304 beneficiaries · Pharmacist avg: 135
Generic prescribing
0%
generic claims · 100% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: SPENCER BELLEW, PHARM.D. is a Pharmacist ([object Object]) practicing in BILLINGS, Montana with a Medicare Part D prescribing footprint of 325 claims across 304 beneficiaries — 100% brand-name prescribing .

What stands out: SPENCER BELLEW, PHARM.D. filed 325 Medicare Part D claims in 2023 across BILLINGS, Montana. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

SPENCER BELLEW, PHARM.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 03/28/2016

NPI 1770945727

Primary specialty

Pharmacist

High-volume

290,447 US NPIs in this specialty

Medicare Part D claims

325 141% vs specialty avg

2023 prescription claims

Specialty avg: 135

Specialty distribution in Montana

How Pharmacist compares to other specialties among Montana providers

Montana providers

Pharmacist share within Montana

1. Pharmacist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pharmacist share within Montana

Specialty board-certification context

Estimated specialty board-certified rate — Pharmacist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pharmacist ABMS/AOA estimate

Est. board-certified rate (Pharmacist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pharmacist) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

SPENCER BELLEW, PHARM.D. is a Pharmacist provider practicing in BILLINGS, Montana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PHARM.D.. NPI: 1770945727. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

SPENCER BELLEW, PHARM.D. appears in the CMS NPPES registry as a Pharmacist provider holding PHARM.D. credentials at 611 N 27TH ST, BILLINGS, MT, 59101, with a listed phone of (406) 259-1441. NPI 1770945727 was issued on 03/28/2016. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BELLEW most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 325 prescription claims written by this provider, covering 304 Medicare beneficiaries and totaling roughly $86K in drug spend, split 100% brand-name and 0% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pharmacist is a high-volume specialty nationwide, with 290,447 enrolled providers across 56 states and an average of 135 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

611 N 27TH ST
BILLINGS, MT 59101

Provider Details

NPI 1770945727
Specialty Pharmacist
Credentials PHARM.D.
Gender Male
NPI Issued 03/28/2016

Brand vs generic prescribing mix · Brand-heavy

SPENCER BELLEW, PHARM.D. — brand share 100.0%
Specialty average (est.)

100% brand-name claims vs 0% generic, on 325 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

325
Total Claims
$86K
Total Drug Cost
304
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
325
Total Day Supply
334
Brand vs Generic
100% brand / 0% generic
Brand Drug Cost
$86K

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
0.90
Gender Split
53% female / 47% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Arexvy
Rsvpref3 Antigen/As01e/Pf
209
Shingrix
Varicella-Zoster Ge/As01b/Pf
82
Boostrix Tdap
"Diphth
N/A

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Pharmacist Overview

How SPENCER BELLEW, PHARM.D. fits within the Pharmacist landscape nationally.

290,447
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider

SPENCER BELLEW, PHARM.D.'s 325 claims are above the specialty average of 135.

Nearby Pharmacist Providers in Montana

Other clinicians with the same primary specialty enrolled in Montana, drawn from the same CMS NPPES roster as BELLEW.

Compare Pharmacist nationally: see state-by-state distribution →

Frequently Asked Questions

What is SPENCER BELLEW, PHARM.D.'s specialty?
SPENCER BELLEW, PHARM.D. specializes in Pharmacist and practices in BILLINGS, Montana. Credentials: PHARM.D..
How much does SPENCER BELLEW, PHARM.D. prescribe under Medicare Part D?
In 2023, SPENCER BELLEW, PHARM.D. wrote 325 Medicare Part D claims totaling $86K in drug costs for 304 beneficiaries.
Where is SPENCER BELLEW, PHARM.D. located?
SPENCER BELLEW, PHARM.D. is located at 611 N 27TH ST, BILLINGS, MT, 59101. Phone: (406) 259-1441.
What is SPENCER BELLEW, PHARM.D.'s NPI number?
SPENCER BELLEW, PHARM.D.'s National Provider Identifier (NPI) is 1770945727, issued on 03/28/2016.
Does SPENCER BELLEW, PHARM.D. prescribe more brand-name or generic drugs?
SPENCER BELLEW, PHARM.D.'s prescribing is 100% brand-name and 0% generic drugs by claim count, with $86K in brand drug costs.
How many Pharmacist providers are there in the US?
There are 290,447 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does SPENCER BELLEW, PHARM.D. prescribe most often?
Based on 2023 Medicare Part D data, SPENCER BELLEW, PHARM.D.'s most frequently prescribed drugs include Arexvy, Shingrix, Boostrix Tdap. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SPENCER BELLEW, PHARM.D. accept Medicare?
SPENCER BELLEW, PHARM.D. appears in CMS Medicare data with 325 Part D claims and 304 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SPENCER BELLEW, PHARM.D.'s credentials?
SPENCER BELLEW, PHARM.D.'s NPI is 1770945727 with credentials PHARM.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology