Joshua Raphael Korzenik, M.D.
NPI 1336194752 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joshua Raphael Korzenik, M.D. is a Gastroenterology Physician provider in Boston, MA (NPI 1336194752).
Provider details
- NPI number
- 1336194752
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 72914 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
218 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 198 | $115 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 20 | $145 |
Typical Medicare-allowed amounts for these services range $115–$145 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ustekinumabbrand: Stelara | 60 | — |
| Mesalamine | 47 | — |
| Risankizumab-Rzaabrand: Skyrizi On-Body | 42 | 12 |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine | 35 | — |
| Famotidine | 25 | — |
| Adalimumabbrand: Humira(cf) Pen | 20 | — |
| Vancomycin Hcl | 17 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-24
- Last updated
- 2012-08-09
Frequently asked questions
- What is Joshua Raphael Korzenik's NPI number?
- Joshua Raphael Korzenik's National Provider Identifier (NPI) is 1336194752, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joshua Raphael Korzenik's specialty?
- Joshua Raphael Korzenik is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Joshua Raphael Korzenik located?
- Joshua Raphael Korzenik's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Joshua Raphael Korzenik's phone number?
- The practice phone number listed in the NPPES registry for Joshua Raphael Korzenik is (617) 732-5500.
- Does Joshua Raphael Korzenik accept Medicare?
- Joshua Raphael Korzenik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joshua Raphael Korzenik's NPI active?
- Yes — Joshua Raphael Korzenik's NPI (1336194752) is active in the NPPES registry as of the last update on 2012-08-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.