Physician Profile
Unclaimed ProfileAbout BIRNS
Based in Rockville, MD, Mark Theodore Birns, M.D. is listed in the NPI registry under gastroenterology. According to Medicare claims data, Mark cared for 1,004 Medicare patients across 1,049 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (301) 251-0015
- Email not available
Practice Locations
9711 MEDICAL CENTER DR SUITE 308
Rockville, MD 20850
Procedures Most Often Billed to Medicare
1,049 services · 1,004 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
208 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
147 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
68 |
| Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare | Procedure | 43251 |
66 |
| Removal of external hemorrhoids by rubber banding | Procedure | 46221 |
25 |
| Stool analysis for blood, by fecal hemoglobin determination by immunoassay | Lab test | 82274 |
261 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
116 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
90 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
25 |
| Colorectal cancer screening; colonoscopy on individual at high risk | Billing code | G0105 |
22 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterologists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 14 related providers in 2 groups
Other gastroenterologists in Rockville 6
Same specialty, same city.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does Dr. Birns specialize in?
Dr. Birns is a gastroenterologist in Rockville, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Gastroenterology”.
NPI registry
Where is Dr. Birns located?
Dr. Birns is listed at 9711 MEDICAL CENTER DR SUITE 308, Rockville, MD 20850. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Birns's phone number?
The number on file is (301) 251-0015. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Birns's NPI number?
Dr. Birns's National Provider Identifier is 1982692828. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Dr. Birns been practicing?
Dr. Birns has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Birns do most often?
According to Medicare billing data, Dr. Birns performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, biopsy of large bowel using a flexible endoscope and removal of polyps or growths of large bowel using an endoscope with mechanical snare, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Birns confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Birns. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.