Dr. Janine Denise Grayson, MD

Dr. Grayson practices at Robert Wood Johnson University Hospital Rahway in Rahway, New Jersey, part of RWJBarnabas Health.

Dr. Grayson's NPI, 1215036397, was assigned on September 22, 2006. Dr. Grayson graduated from Howard University College Of Medicine in 2001. Dr. Grayson's New Jersey license number on file is 25MA07936500.

Dr. Grayson's primary practice is Robert Wood Johnson University Hospital Rahway, at 865 Stone St, Rahway, NJ 07065 in Union County. The practice phone is (732) 381-4200.

Dr. Grayson's primary practice is Robert Wood Johnson University Hospital Rahway in Rahway, New Jersey, part of RWJBarnabas Health. The medical group on file is RWJBarnabas Health Medical Group. Dmand AI also links Dr. Grayson to 1 more hospital, 2 medical groups and 1 group practice or clinic, each named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grayson practices, 3 sites in all. Vendor and product names are available with a free account.

Emergency medicine is Dr. Grayson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Grayson is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Grayson's licenses on file in 2 states: New Jersey and Massachusetts.

CMS data shows 420 Medicare services from Dr. Grayson across 4 procedure codes in 2024, for 389 Medicare patients. Medicare paid $55,523 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 389 Medicare patients who saw Dr. Grayson in 2024. The largest group is 75 to 84, with 142 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 2.06, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Grayson's median patient age at 68, with 53% women.

In 2024, Dr. Grayson wrote 424 Medicare Part D claims for 247 patients. 91% of them were for generic drugs. CMS names the drug for 277 of them, across 10 drugs with 11 or more claims each, at $1,956 in total drug cost. In 2023, CMS named 230 claims across 9 drugs.

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Grayson for performance year 2024, reported as part of a group. Dr. Grayson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

CMS Open Payments shows 17 general payments to Dr. Grayson from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $257.

Dr. Grayson graduated from Howard University College Of Medicine in 2001.

Dr. Grayson is in network with 5 carriers, including Excellus BlueCross BlueShield, CMS Medicare and DE State Medicaid. Medicaid plans come from the most carriers, 3. Check the plan with the practice before a visit.