Doctor profile · Federal record
Dr. Karen Haessler, PA-C
Medical Physician Assistant (CMS: Physician Assistant) · Cambridge, MA
- NPI 1669844064
- Accepts Medicare
- MIPS 88.4 / 100 · 2023
- 11 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1493 Cambridge St
Cambridge, MA 021391047
(781) 771-8076
Credentials & registration
- NPI registered
- October 2015 — 11 yrs on file
- Profile last updated
- March 30, 2016
- Year of graduation
- 2015 — 11 yrs since
- Specialty taxonomy
- 363AM0700X — NUCC code
- State license (1)
- Massachusetts #PA5584
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1669844064. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
375
Distinct HCPCS
5
Medicare allowed
$35,022
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
80307 |
Testing for presence of drug, by chemistry analyzers | 140 | 33 | $61 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 116 | 30 | $118 | |
G0480 |
Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms | 90 | 17 | $112 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 15 | 14 | $113 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 14 | 14 | $72 |
In context: peer comparison
Among 2 peers in Cambridge Medical Physician Assistant, average services per provider: 42. This provider delivers 8.9× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
222
Patients
44
Total drug cost
$61,572
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Buprenorphine-Naloxone (Buprenorphine Hcl/Naloxone Hcl) | Brand | 144 | 44 | $20,794 |
| Suboxone (Buprenorphine Hcl/Naloxone Hcl) | Brand | 78 | 0 | $40,778 |
Frequently asked questions
What is Dr. Karen Haessler's medical specialty?
Dr. Karen Haessler practices Medical Physician Assistant in Cambridge, MA.
Where does Dr. Karen Haessler practice?
Dr. Karen Haessler practices at 1493 Cambridge St, Cambridge, MA 021391047. Office phone: 7817718076.
What is Dr. Karen Haessler's NPI?
Dr. Karen Haessler's National Provider Identifier (NPI) is 1669844064, issued by NPPES.
Does Dr. Karen Haessler accept Medicare assignment?
Yes. Dr. Karen Haessler accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Karen Haessler commonly perform?
Top Medicare-reported procedures in 2023: Testing for presence of drug, by chemistry analyzers (HCPCS 80307); Established patient office or other outpatient visit (HCPCS 99214); Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms (HCPCS G0480). Source: CMS Medicare Physician & Other Practitioners file.