Physician Profile
Unclaimed ProfileAbout GEYER
Based in New York, NY, Mark Blaine Geyer, MD is listed in the NPI registry under hematology/oncology. Mark graduated from Columbia University College of Physicians and Surgeons in 2011. Mark is also listed as specializing in hematology & oncology. Medicare claims data shows Mark provided 740 services to 349 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (212) 639-2000
- Email not available
Practice Locations
1275 YORK AVE
New York, NY 10065
Procedures Most Often Billed to Medicare
740 services · 349 patients · 8 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
234 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
213 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
161 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
37 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
33 |
| Hospital discharge day management, 30 minutes or less | Office visit | 99238 |
29 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
18 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
15 |
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 hematology/oncology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
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 — 23 related providers in 3 groups
Other hematology/oncology specialists in New York 7
Same specialty, same city.
Trained at Columbia University College of Physicians and Surgeons 8
Other providers in the same specialty who trained at the same institution.
Class of 2011 at Columbia University College of Physicians and Surgeons 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Geyer's specialty?
Dr. Geyer is a hematology/oncology in New York, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HEMATOLOGY/ONCOLOGY”.
NPI registry
Where can I find Dr. Geyer?
Dr. Geyer is listed at 1275 YORK AVE, New York, NY 10065. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Geyer?
The number on file is (212) 639-2000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Geyer?
Dr. Geyer's National Provider Identifier is 1831482561. 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
What is Dr. Geyer's medical education?
Dr. Geyer attended Columbia University College of Physicians and Surgeons, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Geyer have?
Dr. Geyer has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Geyer known for?
According to Medicare billing data, Dr. Geyer the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Geyer's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Geyer. 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.