Doctor profile · Federal record
Dr. Karen Michelle Guiang, D.O.
Infectious Disease Physician (CMS: Infectious Disease) · Internal Medicine Physician · Claremont, CA
- NPI 1871738344
- Accepts Medicare
- MIPS 26.2 / 100 · 2023
- 19 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
935 W Foothill Blvd
Claremont, CA 917113304
(626) 851-8880
fax (626) 851-8001
Credentials & registration
- NPI registered
- December 2008 — 18 yrs on file
- Profile last updated
- April 29, 2020
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207RI0200X — NUCC code
- State license (1)
- California #20A10579
- Medicaid (2)
- CA #GR0059520 · CA #20A10579
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1871738344. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
5,837
Distinct HCPCS
7
Medicare allowed
$662,545
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 4,010 | 632 | $121 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 589 | 107 | $80 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 583 | 493 | $178 | |
J7050 |
Infusion, normal saline solution, 250 cc | 390 | 11 | $1 | |
96365 |
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 195 | 11 | $74 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 59 | 40 | $138 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 11 | 11 | $180 |
In context: peer comparison
Among 2 peers in Claremont Infectious Disease Physician, average services per provider: 821. This provider delivers 7.1× the peer median.Open Payments
Industry payments received
All-time total
$1,052
Transactions
54
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Gilead Sciences, INC. | 21 | $395.70 | |
| Merck Sharp & Dohme LLC | 10 | $195.36 | |
| Abbvie INC. | 14 | $180.46 | |
| GlaxoSmithKline, LLC. | 1 | $77.71 | |
| Shionogi INC | 2 | $63.09 | |
| ViiV Healthcare Company | 2 | $48.00 | |
| Insmed, INC. | 2 | $44.75 | |
| Aimmune Therapeutics, INC. | 1 | $31.57 | |
| Paratek Pharmaceuticals, INC. | 1 | $15.21 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
441
Patients
152
Total drug cost
$141,337
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ceftriaxone (Ceftriaxone Sodium) | Brand | 66 | 20 | $6,485 |
| Cefepime Hcl | Generic | 46 | 13 | $11,904 |
| Ampicillin-Sulbactam (Ampicillin Sod/Sulbactam Sod) | Brand | 45 | 0 | $5,371 |
| Vancomycin Hcl | Generic | 44 | 18 | $6,560 |
| Daptomycin | Generic | 40 | 11 | $69,606 |
| Levofloxacin | Generic | 38 | 35 | $177 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 27 | 26 | $348 |
| Piperacillin-Tazobactam (Piperacillin Sodium/Tazobactam) | Brand | 23 | 0 | $6,100 |
| Cephalexin | Generic | 22 | 14 | $184 |
| Ertapenem (Ertapenem Sodium) | Brand | 17 | 0 | $18,519 |
Frequently asked questions
What is Dr. Karen Michelle Guiang's medical specialty?
Dr. Karen Michelle Guiang practices Infectious Disease Physician in Claremont, CA.
Where does Dr. Karen Michelle Guiang practice?
Dr. Karen Michelle Guiang practices at 935 W Foothill Blvd, Claremont, CA 917113304. Office phone: 6268518880.
What is Dr. Karen Michelle Guiang's NPI?
Dr. Karen Michelle Guiang's National Provider Identifier (NPI) is 1871738344, issued by NPPES.
Does Dr. Karen Michelle Guiang accept Medicare assignment?
Yes. Dr. Karen Michelle Guiang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Karen Michelle Guiang 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.