Doctor profile · Federal record
Dr. Charles Chang, MD
Urology Physician (CMS: Urology) · Urology Physician · Urology Physician · Urology Physician · Concord, CA
- NPI 1942436886
- Accepts Medicare
- 18 yrs in practice
- Licensed in 4 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
2222 East St Ste 250
Concord, CA 945202096
(925) 609-7220 - Additional location
-
3124 S 19Th St # 320
Tacoma, WA 984052433
(253) 301-5100 - Additional location
-
199 Mount Eden Pkwy
Bronx, NY 104577703
(718) 992-7669 - Mailing address
-
1450 Treat Blvd Ste 300
Walnut Creek, CA 945972168
Credentials & registration
- NPI registered
- June 2009 — 17 yrs on file
- Profile last updated
- December 12, 2024
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 208800000X — NUCC code
- State licenses (4)
- California #C166684 · Washington #MD60462997 · Illinois #125054599 · New York #314844
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1942436886. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
80
Distinct HCPCS
4
Medicare allowed
$8,144
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 23 | 15 | $76 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 22 | 12 | $112 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 22 | 15 | $91 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 | $150 |
In context: peer comparison
Among 2 peers in Concord Urology Physician, average services per provider: 74. This provider delivers 1.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
875
Patients
335
Total drug cost
$152,870
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Tamsulosin Hcl | Generic | 403 | 138 | $6,175 |
| Myrbetriq (Mirabegron) | Brand | 87 | 26 | $47,118 |
| Oxybutynin Chloride ER (Oxybutynin Chloride) | Brand | 78 | 32 | $1,982 |
| Alfuzosin Hcl ER (Alfuzosin Hcl) | Brand | 65 | 22 | $1,093 |
| Finasteride | Generic | 58 | 27 | $710 |
| Oxybutynin Chloride | Generic | 46 | 19 | $874 |
| Ciprofloxacin Hcl | Generic | 38 | 30 | $135 |
| Solifenacin Succinate | Generic | 31 | 11 | $1,793 |
| Nitrofurantoin Mono-Macro (Nitrofurantoin Monohyd/M-Cryst) | Brand | 18 | 18 | $487 |
| Lupron Depot (Leuprolide Acetate) | Brand | 15 | 0 | $92,288 |
Hospital affiliations
Frequently asked questions
What is Dr. Charles Chang's medical specialty?
Dr. Charles Chang practices Urology Physician in Concord, CA.
Where does Dr. Charles Chang practice?
Dr. Charles Chang practices at 2222 East St Ste 250, Concord, CA 945202096. Office phone: 9256097220.
What is Dr. Charles Chang's NPI?
Dr. Charles Chang's National Provider Identifier (NPI) is 1942436886, issued by NPPES.
Does Dr. Charles Chang accept Medicare assignment?
Yes. Dr. Charles Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Charles Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.