Quick answers
- Does Joshua Greenspan accept Medicare assignment?
- Yes. Medicare's clinician data says Joshua Greenspan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Joshua Greenspan see?
- In 2024, CMS data shows 266 Original Medicare patients and 4,499 services for Joshua Greenspan. This counts Original Medicare only and measures volume, not quality.
- What is Joshua Greenspan's NPI number?
- 1962457218. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Joshua Greenspan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 266 |
|---|---|
| Services billed to Medicare | 4,499 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,310 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)799 services
- Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)731 services
- Testing for presence of drug, by chemistry analyzers (80307)194 services
- Fluoroscopic guidance for needle placement (77002)117 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Arthritis75%
- High blood pressure62%
- High cholesterol62%
- Anxiety43%
- Depression38%
- Diabetes23%
Hospitals where Joshua Greenspan works
Medicare's Facility Affiliation Data lists Joshua Greenspan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Portsmouth Regional HospitalPortsmouth, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300029
Practice locations
Addresses where Joshua Greenspan is enrolled with Medicare (CMS data updated October 2, 2026).
- 14 Manchester Sq, Suite 290Portsmouth, NH 03801 (603) 766‑8500
Specialties
- Interventional Pain Managementprimary
- Anesthesiologyalso
Find other Interventional Pain Management doctors in New Hampshire →
Other interventional pain specialists in New Hampshire
Clinicians with the same Medicare primary specialty in New Hampshire — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1962457218 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians