ZALDY S TAN (M.D.) – Geriatric Medicine (Internal Medicine) Physician, NPI 1174585376
Geriatric Medicine (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
7,722 INTERNAL MEDICINE in MA
Provider Addresses for ZALDY S TAN (M.D.)
1625 Tremont St Fl 3
Brigham and Women's Hospital Division of Aging
Roxbury Crossing, MA 021201616
Phone: (857) 364-5012
Type: Location
West 190th Street, Harbor Gateway, Torrance, Los Angeles County, California, 90278, United States
TORRANCE, CA 905045513
Phone:
Type: Mailing
127 S SAN VICENTE BLVD # A6600
LOS ANGELES, CA 900483311
Phone: (310) 423-6472
Fax: (310) 423-0148
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2012-03-22
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20120322000099 | I | Geriatric Medicine | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| G2212 | Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 43 | 37 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 37 | 37 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 35 | 27 | $0 |
| 96116 | Exam of neurobehavioral status, first hour | 14 | 14 | $0 |
Insurance plans in this area (ZIP 02120)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Critical Care (Intensivists), General Surgery | CA | |
| - | WA | |
| Nurse Practitioner | CA | |
| Physician Assistant | CA | |
| Clinical Psychologist | CA | |
| Nurse Practitioner | CA | |
| N E U R O S U R G E R Y | OH | |
| Nurse Practitioner | CA | |
| General Surgery, Critical Care (Intensivists) | CA | |
| Internal Medicine | CA |
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