DR. REEZWANA CHOWDHURY M.D.
NPI 1316185341
Internal Medicine - Gastroenterology in Bethesda, MD

Q: What is Reezwana Chowdhury's NPI number?

The NPI number for Reezwana Chowdhury is 1316185341. It was assigned to this individual provider in the NPPES registry on January 29, 2009.

Q: What is Reezwana Chowdhury's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since January 29, 2009PECOS Enrolled

6420 ROCKLEDGE DR, BETHESDA, MD 20817(301) 896-6700(301) 896-6850 Get Directions Write a Review

NPPES record last updated: October 25, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Reezwana Chowdhury M.d. NPPES

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

DR. REEZWANA CHOWDHURY M.D. (NPI 1316185341) is an individual gastroenterology provider in Bethesda, Maryland, licensed in Maryland (D78438) and active in the NPI registry since January 2009. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and maintains a secondary practice location in Scranton.

NPPES Registry Identity

NPI1316185341

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameDR. REEZWANA CHOWDHURYCredential: M.D.

Location Address6420 ROCKLEDGE DRBethesda, MD 20817-7837

Mailing Address6201 Greenleigh AveMiddle River, MD 21220-2004 · (410) 933-6423

Phone(301) 896-6700

Fax(301) 896-6850

Sole ProprietorNo

Medical School CMSNew York University School Of MedicineGraduated 2006

Enumeration DateJanuary 29, 2009

Last NPPES UpdateOctober 25, 2024

NPPES CertifiedOctober 25, 2024

✔ NPI 1316185341 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in MD · D78438✔ Licensed in DC · MD038206

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Also ListedInternal MedicineTaxonomy 207R00000X · License BP10024965 (TX)

6420 ROCKLEDGE DR, Bethesda, MD 20817

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Secondary Practice Location 1

Location 11800 Mulberry StScranton, PA 18510-2369 · Phone (646) 221-8346

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID8325299530

PECOS Enrollment IDI20241114002968

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 Reezwana Chowdhury reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Johns Hopkins University

2.3 mi

Neurological Surgery

8600 OLD GEORGETOWN RD
Bethesda, MD 20814

Reassigned Medicare billing, Maryland enrollment
4,483 clinicians in this Medicare group

NPI 1578569240 (410) 955-5000

Johns Hopkins University

6.2 mi

Multi-Specialty

5215 LOUGHBORO RD NW STE 330
Washington, DC 20016

Reassigned Medicare billing, District of Columbia and Maryland enrollments
Also billed through NPI 1902332133 (Maryland)
34 clinicians in this Medicare group

NPI 1952120644 (301) 896-6073

Geisinger Clinic

107 mi

Family Medicine

56 JAM HOUSE RD
Mifflin, PA 17058

Reassigned Medicare billing, Pennsylvania enrollment
4,429 clinicians in this Medicare group

NPI 1255382651 (717) 436-8986

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 11

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 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.

47 services31 patients

Administration of chemotherapy into vein, 1 hour or less 96413

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

37 services22 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

36 services36 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

35 services32 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

30 services30 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

29 services27 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

26 services26 patients

Administration of chemotherapy into vein, each additional hour 96415

Chemotherapy is a treatment method that uses drugs to destroy cancer cells. The drugs are administered into a vein, usually in the arm. Each additional hour of chemotherapy allows for more of the medication to enter your bloodstream to fight against the cancer cells.

21 services14 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

17 services17 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

13 services13 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

13 services13 patients

Hospital Affiliations CMS Care Compare 2

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

Johns Hopkins Hospital, The

Acute Care Hospitals · Baltimore, MD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210009

Location600 North Wolfe StreetBaltimore, MD 21287 · Baltimore City County

Emergency services Birthing friendly

Johns Hopkins Bayview Medical Center

Acute Care Hospitals · Baltimore, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210029

Location4940 Eastern AvenueBaltimore, MD 21224 · Baltimore City County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20817 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

$147.85 typical visit price

range $65.18 – $194.86

Typical copayment $36.96 (range $16.29 – $48.71)

Most-billed visit code 99204

Established Patient

$113.72 typical visit price

range $21.40 – $158.88

Typical copayment $28.43 (range $5.35 – $39.72)

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 20

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

CENTER FOR RETINAL DISEASES AND SURGERY, LLC

Ophthalmology

6420 ROCKLEDGE DR, SUITE 4900
BETHESDA, MD 20817

Montgomery County (301) 571-2000

MS. BARBARA D CHALOM P.A.-C

Hospitalist

6420 ROCKLEDGE DR, 2200
BETHESDA, MD 20817

Montgomery County (301) 896-6880

BARBARA A. SQUILLER RN, CRNP

Nurse Practitioner (Adult Health)

6420 ROCKLEDGE DR, SUITE 3900
BETHESDA, MD 20817

Montgomery County (301) 896-2719

ELAN REISIN MD FACS LLC

Plastic Surgery

6420 ROCKLEDGE DR, SUITE 2300
BETHESDA, MD 20817

Montgomery County (240) 560-5111

DR. WILLIAM J SADLACK M.D.

Orthopaedic Surgery

6420 ROCKLEDGE DR, SUITE 2200
BETHESDA, MD 20817

Montgomery County (301) 530-3220

FOERS PHARMACY

Pharmacy (Community/Retail Pharmacy)

6420 ROCKLEDGE DR
BETHESDA, MD 20817

Montgomery County (301) 493-4422

JOHNS HOPKINS COMMUNITY PHYSICIANS

Internal Medicine

6420 ROCKLEDGE DR
BETHESDA, MD 20817

Montgomery County (410) 933-0000

DR. JODY ELLEN GREEN M.D.

Psychiatry & Neurology (Neurology)

6420 ROCKLEDGE DR, #2500
BETHESDA, MD 20817

Montgomery County (301) 530-9200

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 Reezwana Chowdhury's NPI number?

The NPI number for Reezwana Chowdhury is 1316185341. It was assigned to this individual provider in the NPPES registry on January 29, 2009.

Where is Reezwana Chowdhury located?

Reezwana Chowdhury practices at 6420 Rockledge Dr, Bethesda, MD 20817. The listed phone number is (301) 896-6700.

What is Reezwana Chowdhury's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Reezwana Chowdhury enrolled in Medicare?

Yes. Reezwana Chowdhury is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Reezwana Chowdhury's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Reezwana Chowdhury reassigns Medicare benefits to 3 organizations: Johns Hopkins University (Bethesda, MD), Johns Hopkins University (Washington, DC) and Geisinger Clinic (Mifflin, PA). 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 Reezwana Chowdhury's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Reezwana Chowdhury affiliated with any hospitals?

According to CMS data, Reezwana Chowdhury is affiliated with Johns Hopkins Hospital, The and Johns Hopkins Bayview Medical Center.

When was this NPI record last updated?

The NPPES record for Reezwana Chowdhury was last updated on October 25, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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.