Doctor profile · Federal record
Dr. Michael Yap, M.D.
Nephrology Physician (CMS: Nephrology) · Orange, CA
- NPI 1588847362
- Accepts Medicare
- 19 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
500 S Main St Ste 101
Orange, CA 928684535
(657) 231-2099 - Mailing address
-
2825 Richmond St
Santa Ana, CA 927056839
Credentials & registration
- NPI registered
- December 2007 — 19 yrs on file
- Profile last updated
- September 4, 2023
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- California #A110518
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1588847362. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,209
Distinct HCPCS
8
Medicare allowed
$167,509
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 636 | 154 | $125 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 217 | 86 | $83 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 138 | 126 | $182 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 70 | 51 | $91 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 61 | 17 | $374 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 40 | 25 | $102 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 29 | 16 | $311 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 18 | 17 | $137 |
In context: peer comparison
Among 7 peers in Orange Nephrology Physician, average services per provider: 132. This provider delivers 9.2× the peer median.Open Payments
Industry payments received
All-time total
$102
Transactions
5
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Opko Pharmaceuticals, LLC | 3 | $55.39 | |
| Fresenius USA Marketing, INC. | 1 | $25.30 | |
| Vifor Pharma, INC. | 1 | $21.35 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
529
Patients
95
Total drug cost
$289,424
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Lokelma (Sodium Zirconium Cyclosilicate) | Brand | 73 | 0 | $63,617 |
| Bumetanide | Generic | 52 | 22 | $2,346 |
| Nifedipine ER (Nifedipine) | Brand | 52 | 21 | $4,246 |
| Calcitriol | Generic | 46 | 17 | $1,870 |
| Hydralazine Hcl | Generic | 46 | 19 | $792 |
| Amlodipine Besylate | Generic | 45 | 16 | $595 |
| Sevelamer Carbonate | Generic | 33 | 0 | $12,962 |
| Auryxia (Ferric Citrate) | Brand | 30 | 0 | $87,803 |
| Tolvaptan | Generic | 29 | 0 | $112,043 |
| Valsartan | Generic | 29 | 0 | $2,077 |
Hospital affiliations
Frequently asked questions
What is Dr. Michael Yap's medical specialty?
Dr. Michael Yap practices Nephrology Physician in Orange, CA.
Where does Dr. Michael Yap practice?
Dr. Michael Yap practices at 500 S Main St Ste 101, Orange, CA 928684535. Office phone: 6572312099.
What is Dr. Michael Yap's NPI?
Dr. Michael Yap's National Provider Identifier (NPI) is 1588847362, issued by NPPES.
Does Dr. Michael Yap accept Medicare assignment?
Yes. Dr. Michael Yap accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Michael Yap commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.