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Robert Mcmahon, OD
NPI 1598711400 · Optometrist · Winona, MN
Robert Mcmahon, OD is a Optometrist provider in Winona, MN (NPI 1598711400).
Provider details
- NPI number
- 1598711400
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- License
- 1471 (MN)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
106 E 2nd St
Winona, MN 55987-3410
Phone: (507) 454-4640
Street-level locationGet directions
Mailing address
1836 South Ave
La Crosse, WI 54601-5429
Registry dates
- Enumerated
- 2006-05-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Robert Mcmahon's NPI number?
- Robert Mcmahon's National Provider Identifier (NPI) is 1598711400, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Mcmahon's specialty?
- Robert Mcmahon is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Robert Mcmahon located?
- Robert Mcmahon's practice location on file with NPPES is 106 E 2nd St, Winona, MN 55987-3410.
- What is Robert Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Robert Mcmahon is (507) 454-4640.
- Is Robert Mcmahon's NPI active?
- Yes — Robert Mcmahon's NPI (1598711400) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.