DAVID FLEMMING CHANG (M.D.) – Nephrology Physician, NPI 1043266240
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,404 NEPHROLOGY in CA
Provider Addresses for DAVID FLEMMING CHANG (M.D.)
PO BOX 54130
LOS ANGELES, CA 900540130
Phone: (951) 687-3200
Fax: (951) 687-8923
Type: Mailing
31537 Rancho Pueblo Rd Ste 201
Temecula, CA 925924841
Phone: (951) 687-7140
Fax: (951) 303-3565
Type: Location
591 E Elder St Ste C
Fallbrook, CA 920285001
Phone: (951) 687-7140
Fax: (951) 303-3565
Type: Location
3660 PARK SIERRA DR STE 203
RIVERSIDE, CA 925053071
Phone: (951) 687-3400
Fax: (951) 687-8923
Type: Mailing
36320, Inland Valley Drive, Wildomar, Riverside County, California, 92595, United States
SUITE 308
WILDOMAR, CA 925957512
Phone: (951) 600-7630
Fax: (951) 600-7164
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 88 Open Payments records for all available years, with a total value of $1,905.
Total Amount is formed as General ($1,905) + Research ($0) + Ownership ($0) = $1,905.
Last reported payment date: 2024-12-09 • Largest payer in this snapshot: Bayer Healthcare Pharmaceuticals Inc. ($404).
Total Amount
$1,905
General + Research + Ownership
Payments
88
Total payment records
General Amount
$1,905
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-09
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2004-04-09
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 |
|---|---|---|---|---|
| I20040409000477 | I | Nephrology | 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 |
|---|---|---|---|---|
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | 395 | 60 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 359 | 146 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 327 | 108 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 218 | 101 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 95 | 89 | $0 |
Insurance plans in this area (ZIP 90054)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nephrology, Internal Medicine | NY | |
| Nephrology, Internal Medicine | CA | |
| Diagnostic Radiology, Interventional Radiology | CA | |
| Diagnostic Radiology, Interventional Radiology | MA | |
| - | CA | |
| - | CA | |
| Nephrology, Internal Medicine | MO | |
| Nephrology, Internal Medicine | CA | |
| N E P H R O L O G Y | CA | |
| - | CA |
Reviews
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