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DR. DIANA M. ADAMS M.D.
NPI 1255300653
Obstetrics & Gynecology - Maternal & Fetal Medicine in Greenwich, CT

Active since March 16, 2006PECOS Enrolled
5 PERRYRIDGE RD, SUITE 3-334, GREENWICH, CT 06830(203) 863-3674(203) 863-3467 Get Directions Write a Review

NPPES record last updated: December 18, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Diana M. Adams M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DIANA M. ADAMS M.D. (NPI 1255300653) is an individual maternal & fetal medicine provider in Greenwich, Connecticut, licensed in Connecticut (52077) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1255300653
Entity TypeIndividualFemale
Primary Taxonomy207VM0101X
Provider Legal NameDR. DIANA M. ADAMSCredential: M.D.
Location Address5 PERRYRIDGE RD, SUITE 3-334Greenwich, CT 06830-4608
Mailing Address5 Perryridge Rd, Suite 3-334Greenwich, CT 06830-4608 · (203) 863-3674 · Fax (203) 863-3467
Phone(203) 863-3674
Fax(203) 863-3467
Sole ProprietorNo
Enumeration DateMarch 16, 2006
Last NPPES UpdateDecember 18, 2019
✔ NPI 1255300653 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207VM0101X
License✔ Licensed in CT · 52077
Definition
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.
Also ListedSpecialistTaxonomy 174400000X · License 052077 (CT)
5 PERRYRIDGE RD, Greenwich, CT 06830
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AvMed, Cigna Healthcare, Cigna HealthCare of Florida, Inc. and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Diana M. Adams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Diana Adams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Northeast Medical Group, PLLC
Same address
Internal Medicine
5 PERRYRIDGE RD
Greenwich, CT 06830
  • Reassigned Medicare billing, New York enrollment
  • 47 clinicians in this Medicare group
NPI 1942526207 (203) 384-3975
Tenet Florida Physician Services LLC
1,052 mi
Surgery
1411 N FLAGLER DR STE 8000
West Palm Beach, FL 33401
  • Reassigned Medicare billing, Florida enrollment
  • 528 clinicians in this Medicare group
NPI 1659417467 (561) 650-6231
Pediatrix Medical Group Of Florida Inc
1,097 mi
Pediatric Cardiology
1301 CONCORD TER
Sunrise, FL 33323
  • Reassigned Medicare billing, Florida enrollment
  • 236 clinicians in this Medicare group
NPI 1083711790 (954) 384-0175

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06830 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$75.55 typical visit price
range $19.76 – $149.26
Typical copayment $18.88 (range $4.94 – $37.31)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ZARA NADIA ILAHI MD
Pediatrics (Neonatal-Perinatal Medicine)
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3000
MR. PAUL GREGORY LOFTUS MS
Physical Medicine & Rehabilitation
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3203
SARAH STAMPER M.D.
Student in an Organized Health Care Education/Training Program
5 PERRYRIDGE RD, MEDICAL EDUCATION
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3409
JUNE EVELYN JEON MD
Student in an Organized Health Care Education/Training Program
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3000
ARIANA DOMINICUS PA-C
Physician Assistant
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3000
ERIC LI-MING HUANG BSC, PHARMD
Pharmacist (Pharmacotherapy)
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 863-3199
ROSEMARY PERLEY-KWAUK CRNA
Nurse Anesthetist, Certified Registered
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-5330
DR. FRANCISCO J BREA MD
Anesthesiology
5 PERRYRIDGE RD
GREENWICH, CT 06830
Western Connecticut Planning Region (203) 661-5330

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Diana Adams's NPI number?

The NPI number for Diana Adams is 1255300653. It was assigned to this individual provider in the NPPES registry on March 16, 2006.

Where is Diana Adams located?

Diana Adams practices at 5 Perryridge Rd Suite 3-334, Greenwich, CT 06830. The listed phone number is (203) 863-3674.

What is Diana Adams's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Diana Adams enrolled in Medicare?

Yes. Diana Adams is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Diana Adams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Adams reassigns Medicare benefits to 3 organizations: Northeast Medical Group, PLLC (Greenwich, CT), Tenet Florida Physician Services LLC (West Palm Beach, FL) and Pediatrix Medical Group Of Florida Inc (Sunrise, FL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Diana Adams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Diana Adams accept?

Health plans from AvMed, Cigna HealthCare of Florida, Inc., Cigna Healthcare, Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) list Diana Adams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Diana Adams was last updated on December 18, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.