Doctor profile · Federal record
Dr. Catherine Diefenbach, M.D.
Hematology & Oncology Physician (CMS: Medical Oncology) · New York, NY
- NPI 1982864039
- Accepts Medicare
- MIPS 84.5 / 100 · 2023
- 25 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
160 E 34Th St, NYU Langone Clinical Cancer Center
New York, NY 100164744
(212) 731-5670
fax (212) 731-5502 - Mailing address
-
210 Riverside Dr, Apt. 6G
New York, NY 100256802
Credentials & registration
- NPI registered
- June 2008 — 18 yrs on file
- Profile last updated
- January 28, 2009
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- New York #231212
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1982864039. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
319
Distinct HCPCS
5
Medicare allowed
$34,015
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 188 | 57 | $111 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 51 | 40 | $75 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 50 | 20 | $90 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 18 | 18 | $207 | |
99238 |
Hospital discharge day management, 30 minutes or less | 12 | 11 | $92 |
In context: peer comparison
Among 103 peers in New York Hematology & Oncology Physician, average services per provider: 411. This provider delivers 0.8× the peer median.Open Payments
Industry payments received
All-time total
$11,940
Transactions
15
Manufacturers
7
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 6 | $6,322.84 | |
| AstraZeneca Pharmaceuticals Lp | 1 | $2,740.00 | |
| Kite Pharma, INC. | 1 | $2,390.00 | |
| Genentech USA, INC. | 2 | $162.40 | |
| Pfizer INC. | 2 | $160.05 | |
| E.R. Squibb & Sons, L.L.C. | 2 | $86.44 | |
| BeiGene USA, INC. | 1 | $78.00 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Catherine Diefenbach's medical specialty?
Dr. Catherine Diefenbach practices Hematology & Oncology Physician in New York, NY.
Where does Dr. Catherine Diefenbach practice?
Dr. Catherine Diefenbach practices at 160 E 34Th St, New York, NY 100164744. Office phone: 2127315670.
What is Dr. Catherine Diefenbach's NPI?
Dr. Catherine Diefenbach's National Provider Identifier (NPI) is 1982864039, issued by NPPES.
Does Dr. Catherine Diefenbach accept Medicare assignment?
Yes. Dr. Catherine Diefenbach accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Catherine Diefenbach commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.