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MS. CYNTHIA MARY RONAN IV M.D.
NPI 1346251659
Obstetrics & Gynecology in Derby, CT

Active since August 11, 2006PECOS EnrolledAccepts Medicare Assignment
97.27/100
CMS Quality Rating
300 SEYMOUR AVE, SUITE 108, DERBY, CT 06418(203) 736-6383(203) 736-0499 Get Directions Write a Review

NPPES record last updated: January 4, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ms. Cynthia Mary Ronan Iv M.d. NPPES

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

MS. CYNTHIA MARY RONAN IV M.D. (NPI 1346251659) is an individual obstetrics & gynecology provider in Derby, Connecticut, licensed in Connecticut (33188) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of New York Medical College (1989).

NPPES Registry Identity

NPI1346251659
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMS. CYNTHIA MARY RONAN IVCredential: M.D.
Location Address300 SEYMOUR AVE, SUITE 108Derby, CT 06418-1343
Mailing Address300 Seymour Ave Ste 108Derby, CT 06418-1343 · (203) 736-6383 · Fax (203) 736-0499
Phone(203) 736-6383
Fax(203) 736-0499
Sole ProprietorYes
Medical School CMSNew York Medical CollegeGraduated 1989
Enumeration DateAugust 11, 2006
Last NPPES UpdateJanuary 4, 2023
NPPES CertifiedJanuary 4, 2023
✔ NPI 1346251659 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CT · 33188
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
Also ListedSpecialistTaxonomy 174400000X · License 033188 (CT)
300 SEYMOUR AVE, Derby, CT 06418
Open in Google Maps ↗

Other Identifiers 1

Medicaid001331884CT

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Cynthia Mary Ronan Iv M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8123295946
PECOS Enrollment IDI20120119000471
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 Reassignment

Medicare enrollment records show Cynthia Ronan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Griffin Faculty Physicians, Inc.
0.2 mi
Thoracic Surgery (Cardiothoracic Vascular Surgery)
67 MAPLE AVE, 2ND FLOOR
Derby, CT 06418
  • Reassigned Medicare billing, Connecticut enrollment
  • 190 clinicians in this Medicare group
NPI 1598755605 (203) 732-1330

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

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
29 services20 patients
Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101
This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.
29 services29 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
22 services22 patients
Complete ultrasound scan of pelvis 76856
A complete ultrasound scan of the pelvis is a safe, non-invasive imaging procedure. It uses sound waves to create pictures of your lower abdomen area, helping doctors to evaluate and diagnose any potential issues. It's painless and usually takes about 30 minutes.
18 services17 patients
Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina 76830
An ultrasound scan of the lower abdominal region is a safe, non-invasive procedure that uses sound waves to create images of internal structures. This helps in checking the health of reproductive organs and detecting any abnormalities. The scan is done via a small probe inserted into the body.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06418 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

97.27/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality81.68
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 3

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

CONNECTICUT RADIOLOGY ASSOCIATES PC
Radiology (Diagnostic Radiology)
300 SEYMOUR AVE
DERBY, CT 06418
Naugatuck Valley Planning Region (203) 735-8769
MAUREEN MCGOWAN-SCHWARTZ,M.S.APRN,BC,LLC
Nursing Care
300 SEYMOUR AVE
DERBY, CT 06418
Naugatuck Valley Planning Region (203) 305-3612
ROBERT THOMPSON P.T.
Physical Therapist
300 SEYMOUR AVE, SUITE 101
DERBY, CT 06418
Naugatuck Valley Planning Region (203) 734-2600

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 Cynthia Ronan's NPI number?

The NPI number for Cynthia Ronan is 1346251659. It was assigned to this individual provider in the NPPES registry on August 11, 2006.

Where is Cynthia Ronan located?

Cynthia Ronan practices at 300 Seymour Ave Suite 108, Derby, CT 06418. The listed phone number is (203) 736-6383.

What is Cynthia Ronan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Cynthia Ronan enrolled in Medicare?

Yes. Cynthia Ronan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Cynthia Ronan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cynthia Ronan reassigns Medicare benefits to Griffin Faculty Physicians, Inc. (Derby, CT). The 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 Cynthia Ronan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Cynthia Ronan accept?

Health plans from Anthem Blue Cross and Blue Shield list Cynthia Ronan 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 Cynthia Ronan was last updated on January 4, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.