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DR. FRANK JOSEPH MONGILLO III MD
NPI 1811917289
Internal Medicine in New Haven, CT

Active since July 20, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 07D0933848 · Waiver
26 ELM STREET, NEW HAVEN, CT 06510(203) 776-6845(203) 777-9020 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Frank Joseph Mongillo Iii Md NPPES

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

DR. FRANK JOSEPH MONGILLO III MD (NPI 1811917289) is an individual internal medicine provider in New Haven, Connecticut, licensed in Connecticut (035706) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through September 23, 2027, and is a graduate of George Washington University School Of Medicine (1994).

NPPES Registry Identity

NPI1811917289
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. FRANK JOSEPH MONGILLO IIICredential: MD
Location Address26 ELM STREETNew Haven, CT 06510-2006
Mailing Address26 Elm StreetNew Haven, CT 06510-2006 · (203) 776-6845 · Fax (203) 777-9020
Phone(203) 776-6845
Fax(203) 777-9020
Sole ProprietorNo
Medical School CMSGeorge Washington University School Of MedicineGraduated 1994
Enumeration DateJuly 20, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1811917289 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 035706
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
26 ELM STREET, New Haven, CT 06510
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Other Identifiers 9

Other0443076United Healthcare
Other1027208Aetna
OtherC702Bcbs
Other00135706200Blue Care Family
Other035706Connecticare
OtherP693817Oxford
Other943290Health Net
Other01036706Cigna
Medicare UPING42267

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Frank Joseph Mongillo Iii Md 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 ID7618134248
PECOS Enrollment IDI20120208000934
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 07D0933848

Frank J Mongillo III MD · New Haven, CT
Active · expires Sep 23, 2027
CLIA Number07D0933848
Laboratory TypePhysician Office
Certificate Effective DateSeptember 24, 2025
Certificate Expiration DateSeptember 23, 2027
Laboratory DirectorFrank J. Mongillo III MD
Laboratory Phone(203) 776-6845
Laboratory LocationFrank J Mongillo III MD26 Elm Street, New Haven, CT 06510
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 3

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.
126 services48 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
49 services33 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
38 services38 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06510 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
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
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

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

DEBORAH LOIS SCHROTER, M.D., LLC
Psychiatry & Neurology (Psychiatry)
26 ELM STREET, 3RD FLOOR
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 776-1224

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 Frank Mongillo's NPI number?

The NPI number for Frank Mongillo is 1811917289. It was assigned to this individual provider in the NPPES registry on July 20, 2006.

Where is Frank Mongillo located?

Frank Mongillo practices at 26 Elm Street, New Haven, CT 06510. The listed phone number is (203) 776-6845.

What is Frank Mongillo's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Frank Mongillo enrolled in Medicare?

Yes. Frank Mongillo 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.

Does Frank Mongillo hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 07D0933848) is associated with this NPI, valid through September 23, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Frank Mongillo was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.