David Palchak, M.D.
NPI 1396815965 · Hematology & Oncology Physician · Arroyo Grande, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Palchak, M.D. is a Hematology & Oncology Physician provider in Arroyo Grande, CA (NPI 1396815965).
Provider details
- NPI number
- 1396815965
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G60994 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,630 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 912 | $129 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 236 | $15 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 211 | $140 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 199 | $24 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 178 | $16 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamoxifen Citrate | 66 | 19 |
| Ondansetron Hcl | 52 | 23 |
| Letrozole | 51 | 15 |
| Prednisone | 49 | 21 |
| Osimertinib Mesylatebrand: Tagrisso | 36 | — |
| Olanzapine | 35 | 15 |
| Apixabanbrand: Eliquis | 33 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$353 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-09
- Last updated
- 2022-11-01
- Certified
- 2022-11-01
Frequently asked questions
- What is David Palchak's NPI number?
- David Palchak's National Provider Identifier (NPI) is 1396815965, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Palchak's specialty?
- David Palchak is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is David Palchak located?
- David Palchak's practice location on file with NPPES is 584 Camino Mercado, Arroyo Grande, CA 93420-1816.
- What is David Palchak's phone number?
- The practice phone number listed in the NPPES registry for David Palchak is (805) 474-9143.
- Does David Palchak accept Medicare?
- David Palchak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Palchak's NPI active?
- Yes — David Palchak's NPI (1396815965) is active in the NPPES registry as of the last update on 2022-11-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.