2026 NPPES data Oral & Maxillofacial Surgery (D.M.D.) NPI 1497917132 MD, DDS
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GRANT WISWELL, MD, DDS

Oral & Maxillofacial Surgery (D.M.D.) in MISSOULA, 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
2K
Medicare Part D claims · 441 beneficiaries · Oral & Maxillofacial Surgery (D.M.D.) avg: 324
Industry payments
$128.06
3 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

GRANT WISWELL, MD, DDS filed 1,883 Medicare Part D claims in 2023 as a Oral & Maxillofacial Surgery (D.M.D.) in MISSOULA, Montana.

2K
Part D claims, 2023
$128.06
industry payments (Sunshine Act)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

GRANT WISWELL, MD, DDS's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,883 Top 17% higher than 83% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). This entry sits in this band. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

GRANT WISWELL, MD, DDS practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about GRANT WISWELL, MD, DDS?

Quality data not reported

NPI registry status

Active

Issued 06/25/2008

NPI 1497917132

Primary specialty

Oral & Maxillofacial Surgery (D.M.D.)

Niche

1,112 US NPIs in this specialty

Medicare Part D claims

1,883 481% vs specialty avg

2023 prescription claims

Specialty avg: 324

Specialty distribution in Montana

How Oral & Maxillofacial Surgery (D.M.D.) compares to other specialties among Montana providers

Montana providers

Oral & Maxillofacial Surgery (D.M.D.) share within Montana

1. Oral & Maxillofacial Surgery (D.M.D.)42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Oral & Maxillofacial Surgery (D.M.D.) share within Montana

Specialty board-certification context

Estimated specialty board-certified rate — Oral & Maxillofacial Surgery (D.M.D.) (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Oral & Maxillofacial Surgery (D.M.D.) ABMS/AOA estimate

Est. board-certified rate (Oral & Maxillofacial Surgery (D.M.D.)) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Oral & Maxillofacial Surgery (D.M.D.)) — 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).

GRANT WISWELL, MD, DDS appears in the CMS NPPES registry as a Oral & Maxillofacial Surgery (D.M.D.) provider holding MD, DDS credentials at 3020 S RESERVE ST STE C, MISSOULA, MT, 59801, with a listed phone of (406) 541-2180. NPI 1497917132 was issued on 06/25/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WISWELL 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 1,883 prescription claims written by this provider, covering 441 Medicare beneficiaries and totaling roughly $12K in drug spend, with an opioid prescribing rate of 22.4%. 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.

Oral & Maxillofacial Surgery (D.M.D.) is a narrow specialty nationwide, with 1,112 enrolled providers across 52 states and an average of 324 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

3020 S RESERVE ST STE C
MISSOULA, MT 59801

Provider Details

NPI 1497917132
Specialty Oral & Maxillofacial Surgery (D.M.D.)
Credentials MD, DDS
Gender Male
NPI Issued 06/25/2008

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for GRANT WISWELL, MD, DDS. Source: openpaymentsdata.cms.gov.

Total received

$128

Largest payer

Straumann USA LLC

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Medicare Part D Prescribing Data

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

1,883
Total Claims
$12K
Total Drug Cost
441
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,889
Total Day Supply
15,536
Brand Drug Cost
$0
Generic Drug Cost
$12K
Opioid Claims
422 (22.4% rate)
Antibiotic Claims
471

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
1.02
Gender Split
53% female / 47% male
Age Distribution
<65: 68, 65-74: 196, 75-84: 141, 85+: 36

Top Prescribed Drugs (Medicare Part D)

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

What GRANT WISWELL, MD, DDS prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Chlorhexidine Gluconate
619
Ibuprofen
330
Amoxicillin
309
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
190
Acetaminophen-Codeine
Acetaminophen With Codeine
136
Tramadol Hcl
78
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
74
Clindamycin Hcl
48
Azithromycin
31
Oxycodone Hcl
18

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

Oral & Maxillofacial Surgery (D.M.D.) Overview

How GRANT WISWELL, MD, DDS fits within the Oral & Maxillofacial Surgery (D.M.D.) landscape nationally.

1,112
Oral & Maxillofacial Surgery (D.M.D.) Providers in US
52
States with Oral & Maxillofacial Surgery (D.M.D.)
324
Avg Claims per Provider

GRANT WISWELL, MD, DDS's 1,883 claims are above the specialty average of 324.

Nearby Oral & Maxillofacial Surgery (D.M.D.) Providers in Montana

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

Compare Oral & Maxillofacial Surgery (D.M.D.) nationally: see state-by-state distribution →

Frequently Asked Questions

What is GRANT WISWELL, MD, DDS's specialty?
GRANT WISWELL, MD, DDS specializes in Oral & Maxillofacial Surgery (D.M.D.) and practices in MISSOULA, Montana. Credentials: MD, DDS.
How much does GRANT WISWELL, MD, DDS prescribe under Medicare Part D?
In 2023, GRANT WISWELL, MD, DDS wrote 1,883 Medicare Part D claims totaling $12K in drug costs for 441 beneficiaries.
Where is GRANT WISWELL, MD, DDS located?
GRANT WISWELL, MD, DDS is located at 3020 S RESERVE ST STE C, MISSOULA, MT, 59801. Phone: (406) 541-2180.
What is GRANT WISWELL, MD, DDS's NPI number?
GRANT WISWELL, MD, DDS's National Provider Identifier (NPI) is 1497917132, issued on 06/25/2008.
Does GRANT WISWELL, MD, DDS prescribe opioids?
Yes, GRANT WISWELL, MD, DDS had 422 opioid claims in 2023 with an opioid prescribing rate of 22.4%.
How many Oral & Maxillofacial Surgery (D.M.D.) providers are there in the US?
There are 1,112 Oral & Maxillofacial Surgery (D.M.D.) providers across 52 states in the US. The average Oral & Maxillofacial Surgery (D.M.D.) provider writes 324 Medicare Part D claims per year.
What drugs does GRANT WISWELL, MD, DDS prescribe most often?
Based on 2023 Medicare Part D data, GRANT WISWELL, MD, DDS's most frequently prescribed drugs include Chlorhexidine Gluconate, Ibuprofen, Amoxicillin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GRANT WISWELL, MD, DDS accept Medicare?
GRANT WISWELL, MD, DDS appears in CMS Medicare data with 1,883 Part D claims and 441 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GRANT WISWELL, MD, DDS's credentials?
GRANT WISWELL, MD, DDS's NPI is 1497917132 with credentials MD, DDS. 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