Physician Profile
Unclaimed ProfileAbout REEN
Based in Fremont, CA, Gurcharan Singh Reen, M.D. is listed in the NPI registry under cardiovascular disease (cardiology). Gurcharan is also listed as specializing in cardiovascular disease. According to Medicare claims data, Gurcharan cared for 131 Medicare patients across 248 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
- (510) 790-9047
- Email not available
Practice Locations
1900 MOWRY AVE STE 101
Fremont, CA 94538
Procedures Most Often Billed to Medicare
248 services · 131 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
67 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
66 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
99 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
16 |
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 cardiovascular diseases 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 cardiovascular diseases in Fremont 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1968 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Dr. Reen's specialty?
Dr. Reen is a cardiovascular disease (cardiology) in Fremont, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “CARDIOVASCULAR DISEASE (CARDIOLOGY)”.
NPI registry
Where can I find Dr. Reen?
Dr. Reen is listed at 1900 MOWRY AVE STE 101, Fremont, CA 94538. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Reen?
The number on file is (510) 790-9047. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Reen's NPI number?
Dr. Reen's National Provider Identifier is 1356499578. 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. Reen's medical education?
Dr. Reen attended Other, graduating in 1968. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Reen been practicing?
Dr. Reen has 58 years experience. Calculated from a graduation year of 1968, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Reen known for?
According to Medicare billing data, Dr. Reen provides treatments such as ultrasound of heart with color-depicted blood flow, rate, direction and valve function and routine electrocardiogram using at least 12 leads with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Reen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Reen. 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.