Doctor profile · Federal record
Dr. William Knapp, D.O.
Hospitalist Physician (CMS: Internal Medicine) · Student in an Organized Health Care Education/Training Program · Walnut Creek, CA
- NPI 1710207543
- Accepts Medicare
- MIPS 85.7 / 100 · 2023
- 17 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1220 Rossmoor Pkwy
Walnut Creek, CA 945952501
(925) 947-3393
fax (925) 947-3396 - Mailing address
-
Dept 34929, P.O. Box 39000
San Francisco, CA 941390001
Credentials & registration
- NPI registered
- June 2010 — 16 yrs on file
- Profile last updated
- January 21, 2014
- Year of graduation
- 2009 — 17 yrs since
- Specialty taxonomy
- 208M00000X — NUCC code
- State license (1)
- California #20A11948
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1710207543. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
972
Distinct HCPCS
6
Medicare allowed
$100,956
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 500 | 227 | $89 | |
99239 |
Hospital discharge day management, more than 30 minutes | 201 | 198 | $131 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 108 | 69 | $55 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 85 | 63 | $135 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 57 | 57 | $146 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 21 | 21 | $195 |
In context: peer comparison
Among 20 peers in Walnut Creek Hospitalist Physician, average services per provider: 150. This provider delivers 6.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
91
Patients
54
Total drug cost
$1,646
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prednisone | Generic | 16 | 16 | $162 |
| Cephalexin | Generic | 14 | 14 | $125 |
| Cefpodoxime Proxetil | Generic | 13 | 13 | $818 |
| Pantoprazole Sodium | Generic | 13 | 0 | $191 |
| Furosemide | Generic | 12 | 0 | $192 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 12 | 11 | $78 |
| Metoprolol Tartrate | Generic | 11 | 0 | $79 |
Hospital affiliations
Frequently asked questions
What is Dr. William Knapp's medical specialty?
Dr. William Knapp practices Hospitalist Physician in Walnut Creek, CA.
Where does Dr. William Knapp practice?
Dr. William Knapp practices at 1220 Rossmoor Pkwy, Walnut Creek, CA 945952501. Office phone: 9259473393.
What is Dr. William Knapp's NPI?
Dr. William Knapp's National Provider Identifier (NPI) is 1710207543, issued by NPPES.
Does Dr. William Knapp accept Medicare assignment?
Yes. Dr. William Knapp accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Knapp commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.