DR. CERRAH LYNN MENDELSOHN-ELZAM M.D.
NPI 1568679736
Internal Medicine in Greenwich, CT

Q: What is Cerrah Mendelsohn-elzam's NPI number?

The NPI number for Cerrah Mendelsohn-elzam is 1568679736. It was assigned to this individual provider in the NPPES registry on May 17, 2007.

Q: What is Cerrah Mendelsohn-elzam's specialty?

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

Active since May 17, 2007PECOS Enrolled

70.22/100

CMS Quality Rating

7 RIVERSVILLE RD STE 1, GREENWICH, CT 06831(203) 531-1808(203) 531-8326 Get Directions Write a Review

NPPES record last updated: March 30, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Cerrah Lynn Mendelsohn-elzam M.d. NPPES

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

DR. CERRAH LYNN MENDELSOHN-ELZAM M.D. (NPI 1568679736) is an individual internal medicine provider in Greenwich, Connecticut, licensed in Connecticut (45295) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with Nantucket Cottage Hospital, and maintains a secondary practice location in Greenwich.

NPPES Registry Identity

NPI1568679736

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. CERRAH LYNN MENDELSOHN-ELZAMCredential: M.D.

Location Address7 RIVERSVILLE RD STE 1Greenwich, CT 06831-3697

Mailing Address67 Mountain AveLarchmont, NY 10538-1936 · (917) 440-0782

Phone(203) 531-1808

Fax(203) 531-8326

Sole ProprietorYes

Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 2003

Enumeration DateMay 17, 2007

Last NPPES UpdateMarch 30, 2022

NPPES CertifiedMarch 30, 2022

✔ NPI 1568679736 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CT · 45295

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.

Also ListedEmergency MedicineTaxonomy 207P00000X · License 045295 (CT)

7 RIVERSVILLE RD STE 1, Greenwich, CT 06831

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Secondary Practice Location 1

Location 15 Perryridge Road, Greenwich HospitalGreenwich, CT 06830-4697 · Phone (203) 863-3639

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Cerrah Lynn Mendelsohn-elzam M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8022119031

PECOS Enrollment IDI20070720000405

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

Medicare enrollment records show Cerrah Mendelsohn-elzam reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Glenville Medical Associates P.C

0.1 mi

Internal Medicine

7 RIVERSVILLE RD
Greenwich, CT 06831

Reassigned Medicare billing, Connecticut enrollment
8 clinicians in this Medicare group

NPI 1982826574 (203) 531-1808

Greenwich Hospital

3.4 mi

General Acute Care Hospital

5 PERRYRIDGE RD
Greenwich, CT 06830

Reassigned Medicare billing, Connecticut enrollment
268 clinicians in this Medicare group

NPI 1609846088 (203) 863-3000

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 7

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.

182 services93 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

99 services90 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

97 services96 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

94 services93 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.

80 services80 patients

Annual alcohol misuse screening, 5 to 15 minutes G0442

An annual alcohol misuse screening is a 15-minute check-up to assess your drinking habits. It helps identify if you're consuming alcohol in a way that could harm your health. This is not a judgment, but a tool to promote your wellbeing.

80 services80 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Nantucket Cottage Hospital

Acute Care Hospitals · Nantucket, MA

OwnershipVoluntary non-profit - Private

CMS Certification Number220177

Location57 Prospect StreetNantucket, MA 02554 · Nantucket County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06831 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.

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.

70.22/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

94.44

Promoting Interoperability

Improvement Activities

Cost

28.81

Other Providers at the Same Location NPPES 2

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

DR. JEFFREY S PUGLISI MD

Internal Medicine

7 RIVERSVILLE RD STE 1
GREENWICH, CT 06831

Western Connecticut Planning Region (203) 531-1808

DR. ERIKA SHANNON KRAUSS D.O.

Internal Medicine

7 RIVERSVILLE RD STE 1
GREENWICH, CT 06831

Western Connecticut Planning Region (203) 531-1808

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 Cerrah Mendelsohn-elzam's NPI number?

The NPI number for Cerrah Mendelsohn-elzam is 1568679736. It was assigned to this individual provider in the NPPES registry on May 17, 2007.

Where is Cerrah Mendelsohn-elzam located?

Cerrah Mendelsohn-elzam practices at 7 Riversville Rd Ste 1, Greenwich, CT 06831. The listed phone number is (203) 531-1808.

What is Cerrah Mendelsohn-elzam's specialty?

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

Is Cerrah Mendelsohn-elzam enrolled in Medicare?

Yes. Cerrah Mendelsohn-elzam is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Cerrah Mendelsohn-elzam's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cerrah Mendelsohn-elzam reassigns Medicare benefits to 2 organizations: Glenville Medical Associates P.C (Greenwich, CT) and Greenwich Hospital (Greenwich, CT). 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 Cerrah Mendelsohn-elzam's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Cerrah Mendelsohn-elzam affiliated with any hospitals?

According to CMS data, Cerrah Mendelsohn-elzam is affiliated with Nantucket Cottage Hospital.

When was this NPI record last updated?

The NPPES record for Cerrah Mendelsohn-elzam was last updated on March 30, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.