David William Switzer, M.D.
Ophthalmology Physician · Billings, MT
David William Switzer, M.D. is an ophthalmology physician with a practice address in Billings, Montana, and NPI 1891931572, issued on Dec 30, 2008. Check the license (Montana 12651, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- David William Switzer
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 12651 MT
Self-reported in NPPES; status is on the state search - Practice location
- 1221 N 26TH St, Billings, MT 59101
- Phone
- (406) 252-5681
- Enumerated
- Dec 30, 2008
- Record last updated
- Apr 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20121010000330); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 65 in Montana → Look up another NPI →
Also registered at 1221 N 26TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- George Hatch, MDOphthalmology Physician1801857651
- James Randall, MDOphthalmology Physician1275528432
Verify David William Switzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 12651Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average ophthalmology physician in 2024
146 Medicare Part D claims for 40 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 26% of claims.
Most prescribed
- Ketorolac Tromethamine54 claims
- Prednisolone Acetate36 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
David William Switzer among 65 ophthalmology physician records in Montana
David William Switzer, M.D. is one of 65 ophthalmology physician records with a practice address in Montana. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 77% of them.
- NPI issued2008 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2006 · median 1998 among the 38 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Montana
There are 65 ophthalmology physician records in Montana.
All 65 in Montana → Every provider in Billings → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Jerald Bell, MDBillings, MT 591011003838236
- James Cornetet, M.D.Billings, MT 591011306868153
- Curtis Frewin, M.D.Billings, MT 591011790977262
- James Good, MDBillings, MT 591011154433662
- George Hatch, MDBillings, MT 591011801857651
- Deborah Keenum, MDBillings, MT 591011063524486
- James Randall, MDBillings, MT 591011275528432
- James Threatt, M.D.Billings, MT 591011750303582
Common questions
What is David William Switzer, M.D.'s NPI number?
David William Switzer, M.D.'s National Provider Identifier (NPI) is 1891931572, issued on Dec 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is David William Switzer, M.D. located?
The NPPES record lists a practice address at 1221 N 26TH St, Billings, MT, 59101. Phone: (406) 252-5681. Providers update this record themselves, so call before visiting.
How can I verify David William Switzer, M.D.'s license?
NPPES lists Montana license number 12651, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David William Switzer, M.D. prescribe under Medicare Part D?
In 2024, David William Switzer, M.D. had 146 Medicare Part D claims for 40 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.