Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mr. Mark Adam Watson, DO

Individual provider Family Medicine Physician · NPI 1548554157

Mr. Mark Adam Watson, DO is registered under Family Practice in Berwyn, Illinois. Qualified in 2011, 15 years ago. Practices with Natarajan Medical Group of Illinois PC, a 15-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
15
Licensed in
IL
In the registry since
2011
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3231 Euclid Ave 5th Fl
Berwyn, IL 60402-3471 Not confirmed with CMS for 13 years — call before visiting
Phone: (708) 783-2000
Fax: (708) 783-3656
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 125-059143 (IL)

Record details

NPI number1548554157
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 1, 2011
Last updated in NPPESJanuary 10, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Natarajan Medical Group Of Illinois Pc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients249
Services billed 1,645 a service is one billed item, such as a visit, a test or a procedure
Average patient age81

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Swedish Hospital Hospital · Chicago, IL · listed as Swedish Covenant Hospital
  • Accentcare Hospice & Palliative Care Of Illinois Hospice · Rosemont, IL

Colleagues at Natarajan Medical Group of Illinois PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 15 clinicians in the practice; 9 are shown here.

Other providers in Berwyn