NPI age
19 years
Enumerated 2007-02-01
● Active
Type 1 · Individual
Nancy Ellen Rosenstein Messonnier, M.D.
Messonnier is 1 of 105 clinic/center providers in Atlanta and 1 of 730 in Georgia.
Primary specialty
Clinic/Center
Licensed in
PA
1 state
Status
Active
No deactivations on record
Last NPPES update
2007-07-08
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 730 active clinic/center providers in Georgia.
NPI age
19 years
↑ 10 yr above median (9 yr)
State licenses
1 state
0% of peers hold multiple states
Subspecialties
0
14% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-02Enumerated in NPPES
2007
2026
Where they practice
Practice location
1600 Clifton Rd Ne
Atlanta, GA 303294018
Mailing address
202 Johnston Place
Decatur, GA 300303539
Specialties
-
Clinic/Center PrimaryA facility or distinct part of one used for the diagnosis and treatment of outpatients. "Clinic/Center" is irregularly defined, sometimes being limited to organizations serving specialized treatment requirements or distinct...
Practice context
Part of a multi-provider practice. 105 other active providers share this practice address in NPPES.
Recently enumerated nearby: 2 new clinic/center providers have been added in Atlanta in the last 180 days.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.