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DR. GRANT MATTHEW WISWELL MD, DDS
NPI 1497917132
Dentist in Missoula, MT

Active since June 25, 2008Opted out of Medicare · through Oct 8, 2026
3020 S RESERVE ST STE C, MISSOULA, MT 59801(406) 541-2180(406) 541-2188 Get Directions Write a Review

NPPES record last updated: October 7, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Oct 7, 2025, Jan 18, 2016 (2 updates tracked since 2016).

About Dr. Grant Matthew Wiswell Md, Dds NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GRANT MATTHEW WISWELL MD, DDS (NPI 1497917132) is an individual dentist in Missoula, Montana, licensed in Montana (2433) and active in the NPI registry since June 2008. He has opted out of Medicare through October 8, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1497917132
Entity TypeIndividualMale
Primary Taxonomy122300000X
Provider Legal NameDR. GRANT MATTHEW WISWELLCredential: MD, DDS
Location Address3020 S RESERVE ST STE CMissoula, MT 59801-7652
Mailing Address3020 S Reserve St Ste CMissoula, MT 59801-7652 · (406) 541-2180 · Fax (406) 541-2188
Phone(406) 541-2180
Fax(406) 541-2188
Sole ProprietorYes
Enumeration DateJune 25, 2008
Last NPPES UpdateOctober 7, 20252 updates tracked since enumeration
NPPES CertifiedOctober 7, 2025
✔ NPI 1497917132 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyDentistDental Providers
Taxonomy Code122300000X
License✔ Licensed in MT · 2433
Definition
A dentist is a person qualified by a doctorate in dental surgery (D.D.S.) or dental medicine (D.M.D.), licensed by the state to practice dentistry, and practicing within the scope of that license. There is no difference between the two degrees: dentists who have a DMD or DDS have the same education. Universities have the prerogative to determine what degree is awarded. Both degrees use the same curriculum requirements set by the American Dental Association's Commission on Dental Accreditation. Generally, three or more years of undergraduate education plus four years of dental school is required to graduate and become a general dentist. State licensing boards accept either degree as equivalent, and both degrees allow licensed individuals to practice the same scope of general dentistry. Additional post-graduate training is required to become a dental specialist.
Also ListedDentist · Oral and Maxillofacial SurgeryTaxonomy 1223S0112X · License 2433 (MT)
Also ListedOral & Maxillofacial SurgeryTaxonomy 204E00000X · License 12707 (MT)
3020 S RESERVE ST STE C, Missoula, MT 59801
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

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Opted out of Medicare

Dr. Grant Matthew Wiswell Md, Dds has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 8, 2018 through October 8, 2026.

Opt-Out Effective DateOctober 8, 2018
Opt-Out In Effect ThroughOctober 8, 2026Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59801 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$87.97 typical visit price
range $56.81 – $172.26
Typical copayment $21.99 (range $14.20 – $43.06)
Most-billed visit code 99203
Established Patient
$70.82 typical visit price
range $18.24 – $140.32
Typical copayment $17.70 (range $4.56 – $35.08)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grant Wiswell's NPI number?

The NPI number for Grant Wiswell is 1497917132. It was assigned to this individual provider in the NPPES registry on June 25, 2008.

Where is Grant Wiswell located?

Grant Wiswell practices at 3020 S Reserve St Ste C, Missoula, MT 59801. The listed phone number is (406) 541-2180.

What is Grant Wiswell's specialty?

The primary specialty registered for this NPI is Dentist with taxonomy code 122300000X.

Is Grant Wiswell enrolled in Medicare?

No. Grant Wiswell has opted out of Medicare through October 8, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Grant Wiswell was last updated on October 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.