DR. OMAR D SANTOYO PACHECO M.D.
NPI 1467695387
Hospitalist in Springfield, MA
About Dr. Omar D Santoyo Pacheco M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. OMAR D SANTOYO PACHECO M.D. (NPI 1467695387) is an individual hospitalist provider in Springfield, Massachusetts, licensed in Massachusetts (251134) and active in the NPI registry since April 2009. He is enrolled in Medicare PECOS, is affiliated with Mercy Medical Ctr, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Omar D Santoyo Pacheco M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Omar Santoyo Pacheco reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Springfield, MA 01104
- Reassigned Medicare billing, Massachusetts enrollment
- 168 clinicians in this Medicare group
Holyoke, MA 01040
- Reassigned Medicare billing, Massachusetts enrollment
- 241 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Medical Ctr
Acute Care Hospitals · Springfield, MABaystate Medical Center
Acute Care Hospitals · Springfield, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01199 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SPRINGFIELD, MA 01199
SPRINGFIELD, MA 01199
SPRINGFIELD, MA 01199
SPRINGFIELD, MA 01199
SPRINGFIELD, MA 01199
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Omar Santoyo Pacheco's NPI number?
The NPI number for Omar Santoyo Pacheco is 1467695387. It was assigned to this individual provider in the NPPES registry on April 7, 2009.
Where is Omar Santoyo Pacheco located?
Omar Santoyo Pacheco practices at 759 Chestnut St, Springfield, MA 01199. The listed phone number is (413) 794-8120.
What is Omar Santoyo Pacheco's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Omar Santoyo Pacheco enrolled in Medicare?
Yes. Omar Santoyo Pacheco is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Omar Santoyo Pacheco's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Omar Santoyo Pacheco reassigns Medicare benefits to 2 organizations: Mercy Inpatient Medical Associates Inc. (Springfield, MA) and Holyoke Medical Center, Inc. (Holyoke, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Omar Santoyo Pacheco's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Omar Santoyo Pacheco accept?
Health plans from Taro Health list Omar Santoyo Pacheco as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Omar Santoyo Pacheco affiliated with any hospitals?
According to CMS data, Omar Santoyo Pacheco is affiliated with Mercy Medical Ctr and Baystate Medical Center.
When was this NPI record last updated?
The NPPES record for Omar Santoyo Pacheco was last updated on June 28, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Omar D Santoyo Pacheco, M.D. · NPI 1467695387
Hospitalist physician in Springfield, Massachusetts. Individual provider, active in the CMS NPPES registry since April 7, 2009.
## Identity
- **NPI:** 1467695387 (Entity type: Individual)
- **Enumerated:** April 7, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 251134 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 759 CHESTNUT ST, Springfield, MA 01199-1619
- **Phone:** (413) 794-8120
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Mercy Inpatient Medical Associates Inc. (NPI 1407845282, Springfield, MA); Holyoke Medical Center, Inc. (NPI 1750395737, Holyoke, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** June 28, 2012
---
Source: [NPI Profile](https://npiprofile.com/npi/1467695387) · Data from the CMS NPPES public registry.