Doctor profile · Federal record
Dr. Siamak Milanchi, M.D.
Colon & Rectal Surgery Physician (CMS: Colorectal Surgery (Proctology)) · Surgery Physician · Irvine, CA
- NPI 1083829956
- Accepts Medicare
- 30 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
16300 Sand Canyon Ave Ste 604
Irvine, CA 926183706
(949) 429-0268
fax (949) 420-2180 - Mailing address
-
Po Box 52435
Irvine, CA 926192435
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- October 22, 2012
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 208C00000X — NUCC code
- State license (1)
- California #A92723
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1083829956. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
200
Distinct HCPCS
3
Medicare allowed
$26,797
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 100 | 63 | $139 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 54 | 54 | $122 | |
46600 |
Diagnostic exam of anus using an endoscope | 46 | 41 | $138 |
In context: peer comparison
Among 5 peers in Irvine Colon & Rectal Surgery Physician, average services per provider: 35. This provider delivers 5.7× the peer median.Open Payments
Industry payments received
All-time total
$33
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Baxter Healthcare | 1 | $33.45 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
25
Patients
23
Total drug cost
$443
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 25 | 23 | $443 |
Hospital affiliations
Frequently asked questions
What is Dr. Siamak Milanchi's medical specialty?
Dr. Siamak Milanchi practices Colon & Rectal Surgery Physician in Irvine, CA.
Where does Dr. Siamak Milanchi practice?
Dr. Siamak Milanchi practices at 16300 Sand Canyon Ave Ste 604, Irvine, CA 926183706. Office phone: 9494290268.
What is Dr. Siamak Milanchi's NPI?
Dr. Siamak Milanchi's National Provider Identifier (NPI) is 1083829956, issued by NPPES.
Does Dr. Siamak Milanchi accept Medicare assignment?
Yes. Dr. Siamak Milanchi accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Siamak Milanchi commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99203); Diagnostic exam of anus using an endoscope (HCPCS 46600). Source: CMS Medicare Physician & Other Practitioners file.