What is Mary Duffy's NPI number?

Mary Duffy's National Provider Identifier (NPI) is 1891839858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mary Duffy's specialty?

Mary Duffy is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).

Where is Mary Duffy located?

Mary Duffy's practice location on file with NPPES is 801 Newton Rd, Iowa City, IA 52242-1001.

What is Mary Duffy's phone number?

The practice phone number listed in the NPPES registry for Mary Duffy is (319) 335-7440.

Is Mary Duffy's NPI active?

Yes — Mary Duffy's NPI (1891839858) is active in the NPPES registry as of the last update on 2024-01-11.

IndividualActive

Mary Duffy, D.D.S.

NPI 1891839858 · General Practice Dentistry · Iowa City, IA

Mary Duffy, D.D.S. is a General Practice Dentistry provider in Iowa City, IA (NPI 1891839858).

Provider details

NPI number: 1891839858
Entity type: Individual
Primary specialty: General Practice DentistryDental Providers
Credential: D.D.S.
Sex: Female
Sole proprietor: No
License: 06935 (IA)

Specialties & taxonomies

General Practice DentistryPrimary1223G0001XLicense 06935 (IA)
Dental Providers
Oral and Maxillofacial Surgery (Dentist)1223S0112XLicense 5488 (NC)
Dental Providers

Profile Score

Detailed profile(94/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
19 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
2 documented practice locations

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

801 Newton Rd

Iowa City, IA 52242-1001

Phone: (319) 335-7440

Fax: (319) 335-7451

Street-level locationGet directions

More IA providers

Mailing address

322 Dental Science Bldg S

Iowa City, IA 52242-1001

Additional practice locations (1)

1000 Trent Drive
Durham, NC 27710-0001
Phone: (919) 684-8111

Enumerated: 2007-02-16
Last updated: 2024-01-11
Certified: 2024-01-10

Frequently asked questions

What is Mary Duffy's NPI number?: Mary Duffy's National Provider Identifier (NPI) is 1891839858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mary Duffy's specialty?: Mary Duffy is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
Where is Mary Duffy located?: Mary Duffy's practice location on file with NPPES is 801 Newton Rd, Iowa City, IA 52242-1001.
What is Mary Duffy's phone number?: The practice phone number listed in the NPPES registry for Mary Duffy is (319) 335-7440.
Is Mary Duffy's NPI active?: Yes — Mary Duffy's NPI (1891839858) is active in the NPPES registry as of the last update on 2024-01-11.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.