Joshua Matthew Varghise Mammen, MD

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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.

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

• Bellevue Medical Center Hospital · Bellevue, NE · listed as Bellevue Medical Center LLC
• Great Plains Health Hospital · North Platte, NE · listed as Great Plains Pho
• The Nebraska Medical Center Hospital · Omaha, NE

Colleagues at Unmc Physicians

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1484 clinicians in the practice; 12 are shown here.

• Shubham Agarwal Internal Medicine Physician · North Chicago, IL
• Alfred Fisher, MD Geriatric Medicine (Internal Medicine) Physician · Omaha, NE
• Kevin L Garvin, MD Orthopaedic Surgery Physician · Omaha, NE
• Mikayla Marie Greenwald Medical Physician Assistant · Omaha, NE
• Andrea R Kaufman, DNP, AGACNP-BC Acute Care Nurse Practitioner · Omaha, NE
• MS. Lisa Joy Kuechenmeister, PA-C Medical Physician Assistant · Omaha, NE
• Susan M Moore, APRN Nurse Practitioner · Omaha, NE
• Matthew A Mormino, MD Orthopaedic Surgery Physician · Omaha, NE
• Armin Nowroozpoordailami, MD Student in an Organized Health Care Education/Training Program · Pittsburgh, PA
• Dr. Mahliqha Qasimyar, MD Internal Medicine Physician · Omaha, NE
• Dr. Amber Marie Tyler, MD Family Medicine Physician · Omaha, NE
• Joel Kent Van de Graaff, MD Allergy & Immunology Physician · Omaha, NE

Other providers in Omaha

• Dr. George William Dittrick, MD

  Individual Surgical Oncology Physician · NPI 1669530630

  8111 Dodge St Ste 263, Omaha, NE 68114-4129 · (402) 354-8163

• Jason M. Foster, MD

  Individual Surgical Oncology Physician · NPI 1659489466

  601 N 30th St Ste 2803, Omaha, NE 68131-2137 · (402) 280-4100

• Dr. Robert Hart Lindau III, MD

  Individual Surgical Oncology Physician · NPI 1659587194

  8303 Dodge St Ste 304, Omaha, NE 68114-4108 · (402) 354-5048

• MS. Jessica E Maxwell, MD

  Individual Surgical Oncology Physician · NPI 1417404633

  983280 Nebraska Medical Ctr, Omaha, NE 68198-3280 · (402) 559-9800

• Paige Harwell, MD LLC

  Organization Surgical Oncology Physician · NPI 1306764493

  12337 Douglas Cir, Omaha, NE 68154-2329 · (316) 655-3133

• Jessica Barbara Shank, MD

  Individual Surgical Oncology Physician · NPI 1275977654

  505 S 45th St, Omaha, NE 68198-0001 · (402) 559-5600