Physician Profile
Unclaimed ProfileAbout HOROWITZ
Based in New York, NY, Mark David Horowitz, MD is listed in the NPI registry under internal medicine. Mark graduated from Northeastern Ohio University College of Medicine in 1983. Mark is also listed as specialising in rheumatology.
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
Common questions
What kind of doctor is Dr. Horowitz?
Dr. Horowitz is an internal medicine in New York, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
What is Dr. Horowitz's address?
Dr. Horowitz is listed at 21 EAST 90TH ST, New York, NY 10128. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Horowitz?
The number on file is (212) 860-3077. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Horowitz's NPI number?
Dr. Horowitz's National Provider Identifier is 1154490530. 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
Where did Dr. Horowitz train?
Dr. Horowitz attended Northeastern Ohio University College of Medicine, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Horowitz been practising?
Dr. Horowitz has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Horowitz perform?
According to Medicare billing data, Dr. Horowitz performs procedures including insertion of needle into vein for collection of blood sample and aspiration and/or injection of fluid from large joint; provides treatments such as test to measure expiratory airflow and volume changes before and after medication administration and ultrasound study of arm and leg arteries, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Horowitz confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Horowitz. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (212) 860-3077
- Email not available
Practice Locations
21 EAST 90TH ST
New York, NY 10128
Procedures Most Often Billed to Medicare
4,528 services · 1,742 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
645 |
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
32 |
| Test to measure expiratory airflow and volume changes before and after medication administration | Treatment | 94060 |
238 |
| Ultrasound study of arm and leg arteries | Treatment | 93922 |
210 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
161 |
| Influenza vaccine, trivalent derived from cell cultures | Treatment | 90661 |
78 |
| Administration of vaccine | Treatment | 90471 |
64 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
2,050 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
824 |
| Administration of influenza virus vaccine | Billing code | G0008 |
79 |
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.
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.
Other internal medicines in New York 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Northeastern Ohio University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1983 at Northeastern Ohio University College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in NY who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.