IndividualActive
Jerald Underdahl, MD
NPI 1043284581 · Ophthalmology Physician · Phoenix, AZ
Jerald Underdahl, MD is a Ophthalmology Physician provider in Phoenix, AZ (NPI 1043284581).
Provider details
- NPI number
- 1043284581
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 28541 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1331 N 7th St
100
Phoenix, AZ 85006-2754
Phone: (602) 222-2234
Fax: (866) 985-7247
Street-level locationGet directions
Mailing address
Po Box 97876
Phoenix, AZ 85060-7876
Registry dates
- Enumerated
- 2006-02-13
- Last updated
- 2016-06-28
Frequently asked questions
- What is Jerald Underdahl's NPI number?
- Jerald Underdahl's National Provider Identifier (NPI) is 1043284581, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jerald Underdahl's specialty?
- Jerald Underdahl is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Jerald Underdahl located?
- Jerald Underdahl's practice location on file with NPPES is 1331 N 7th St, Phoenix, AZ 85006-2754.
- What is Jerald Underdahl's phone number?
- The practice phone number listed in the NPPES registry for Jerald Underdahl is (602) 222-2234.
- Is Jerald Underdahl's NPI active?
- Yes — Jerald Underdahl's NPI (1043284581) is active in the NPPES registry as of the last update on 2016-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.