Physician Profile
Unclaimed ProfileAbout KLEIN
Based in New Hyde Park, NY, William M Klein, MD is listed in the NPI registry under general practice. William graduated from Icahn School of Medicine at Mount Sinai in 1994. William is also listed as specialising in internal medicine. According to Medicare claims data, William cared for 1,638 Medicare patients across 4,179 services.
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 does Dr. Klein specialise in?
Dr. Klein is a general practice in New Hyde Park, NY. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GENERAL PRACTICE”.
NPI registry
Where is Dr. Klein located?
Dr. Klein is listed at 1 HOLLOW LN STE 109 SUITE 230, New Hyde Park, NY 11042. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Klein's phone number?
The number on file is (516) 627-4433. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Klein's NPI number?
Dr. Klein's National Provider Identifier is 1659359578. 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. Klein go to medical school?
Dr. Klein attended Icahn School of Medicine at Mount Sinai, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Klein been practising?
Dr. Klein has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Klein do most often?
According to Medicare billing data, Dr. Klein performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Klein confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Klein. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (516) 627-4433
- Email not available
Practice Locations
1 HOLLOW LN STE 109 SUITE 230
New Hyde Park, NY 11042
Procedures Most Often Billed to Medicare
4,179 services · 1,638 patients · 24 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
591 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
235 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
166 |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
108 |
| Test to measure rate of airflow | Treatment | 94375 |
18 |
| Administration of vaccine | Treatment | 90471 |
15 |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
13 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
11 |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
680 |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Drug given | J3420 |
117 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated 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 8
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.
Class of 1994 at Icahn School of Medicine at Mount Sinai 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
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.