1. Home
  2. Directory
  3. Maryland
  4. Rockville
  5. Internal Medicine
  6. NPI Profile

DR. MARK THEODORE BIRNS M.D.
NPI 1982692828
Internal Medicine - Gastroenterology in Rockville, MD

Active since October 13, 2005PECOS Enrolled
9711 MEDICAL CENTER DR, SUITE 308, ROCKVILLE, MD 20850(301) 251-0015(301) 340-9360 Get Directions Write a Review

NPPES record last updated: March 4, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Mark Theodore Birns M.d. NPPES

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

DR. MARK THEODORE BIRNS M.D. (NPI 1982692828) is an individual gastroenterology provider in Rockville, Maryland, licensed in Maryland (D0024994) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1982692828
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. MARK THEODORE BIRNSCredential: M.D.
Location Address9711 MEDICAL CENTER DR, SUITE 308Rockville, MD 20850-3323
Mailing Address9711 Medical Center Dr, Suite 308Rockville, MD 20850-3323 · (301) 251-1244 · Fax (301) 340-9360
Phone(301) 251-0015
Fax(301) 340-9360
Sole ProprietorNo
Enumeration DateOctober 13, 2005
Last NPPES UpdateMarch 4, 2013
✔ NPI 1982692828 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in MD · D0024994
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.
9711 MEDICAL CENTER DR, Rockville, MD 20850
Open in Google Maps ↗

Other Identifiers 4

Medicaid322021400MD
Medicare PIN133215ZAOHMD
Medicare UPINB70889MD
Medicare PIN129863ZADWDC

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Theodore Birns 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 Reassignment

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

Capital Digestive Care, LLC
Same address
Gastroenterology
9711 MEDICAL CENTER DR STE 308
Rockville, MD 20850
  • Reassigned Medicare billing, District of Columbia and Maryland enrollments
  • Also billed through NPI 1164683181 (Maryland)
  • 109 clinicians in this Medicare group
NPI 1811735368 (301) 251-1244

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.

Stool analysis for blood, by fecal hemoglobin determination by immunoassay 82274
A stool analysis for blood, or fecal hemoglobin determination by immunoassay, is a test that checks for hidden blood in your stool. This test helps identify potential issues in your digestive system. It involves collecting a small stool sample which is then analyzed in a lab for the presence of blood.
261 services239 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.
208 services202 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.
147 services144 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.
116 services107 patients
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.
90 services87 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.
68 services68 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20850 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 19

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

MS. BERIT ANNE SILVA CRNP
Specialist
9711 MEDICAL CENTER DR, SUITE 308
ROCKVILLE, MD 20850
Montgomery County (301) 251-1244
EMILY ECKERLEY LESCH D.O.
Obstetrics & Gynecology
9711 MEDICAL CENTER DR, SUITE 109
ROCKVILLE, MD 20850
Montgomery County (301) 762-5501
DR. SHIRLEY ANN OLSEN M.D.
Legal Medicine
9711 MEDICAL CENTER DR, SUITE 100
ROCKVILLE, MD 20850
Montgomery County (301) 251-2600
DR. VICTOR WITTEN M.D.
Internal Medicine (Gastroenterology)
9711 MEDICAL CENTER DR, SUITE 308
ROCKVILLE, MD 20850
Montgomery County (301) 251-0015
DR. MARK STEVEN GLOGER M.D.
Internal Medicine (Gastroenterology)
9711 MEDICAL CENTER DR, SUITE 308
ROCKVILLE, MD 20850
Montgomery County (301) 251-1244
DR. RORY CHRISTOPHER BYRNE M.D.
General Practice
9711 MEDICAL CENTER DR
ROCKVILLE, MD 20850
Montgomery County (410) 707-5904
ORTHOCARE SOLUTIONS INC
Durable Medical Equipment & Medical Supplies
9711 MEDICAL CENTER DR, SUITE 201
ROCKVILLE, MD 20850
Montgomery County (301) 990-1640
ORTHOTIC SOLUTIONS, LLC
Specialist
9711 MEDICAL CENTER DR, SUITE 106
ROCKVILLE, MD 20850
Montgomery County (240) 403-1770

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 Mark Birns's NPI number?

The NPI number for Mark Birns is 1982692828. It was assigned to this individual provider in the NPPES registry on October 13, 2005.

Where is Mark Birns located?

Mark Birns practices at 9711 Medical Center Dr Suite 308, Rockville, MD 20850. The listed phone number is (301) 251-0015.

What is Mark Birns's specialty?

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

Is Mark Birns enrolled in Medicare?

Yes. Mark Birns is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Birns's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Birns reassigns Medicare benefits to Capital Digestive Care, LLC (Rockville, MD). 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 Mark Birns's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Birns was last updated on March 4, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.