Physician Profile
Unclaimed ProfileAbout ASCH
Based in New Haven, CT, William Stuart Asch, M.D., PhD is listed in the NPI registry under nephrology. William graduated from State University of New York at Stony Brook, School of Medicine in 2001. William is also listed as specializing in internal medicine. According to Medicare claims data, William cared for 316 Medicare patients across 560 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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (203) 688-4748
- Email not available
Practice Locations
20 YORK STREET CB 2041 HOSPITALIST SERVICE
New Haven, CT 06510
Procedures Most Often Billed to Medicare
560 services · 316 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Needle biopsy of kidney | Procedure | 50200 |
21 |
| Ultrasonic guidance for needle placement | Imaging | 76942 |
21 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
257 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
119 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
70 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
47 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
25 |
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 nephrology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
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 nephrology specialists in New Haven 6
Same specialty, same city.
More connections — 18 related providers in 3 groups
Trained at State University of New York at Stony Brook, School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2001 at State University of New York at Stony Brook, School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Needle biopsy of kidney 2
Providers in CT who bill this service to Medicare most often.
Common questions
What is Dr. Asch's specialty?
Dr. Asch is a nephrology in New Haven, CT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “NEPHROLOGY”.
NPI registry
Where can I find Dr. Asch?
Dr. Asch is listed at 20 YORK STREET CB 2041 HOSPITALIST SERVICE, New Haven, CT 06510. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Asch?
The number on file is (203) 688-4748. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Asch's NPI number?
Dr. Asch's National Provider Identifier is 1003933326. 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. Asch's medical education?
Dr. Asch attended State University of New York at Stony Brook, School of Medicine, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Asch been practicing?
Dr. Asch has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Asch known for?
According to Medicare billing data, Dr. Asch performs procedures including needle biopsy of kidney; reads or performs imaging such as ultrasonic guidance for needle placement, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Asch confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Asch. 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.