Dr. Melissa M. Grier, MD
- Medicare services, 2024
- 22
- Medicare patients, 2024
- 26
- Part D claims, 2024
- 131
- Hospital affiliations
- 2
- Industry payments
- $6,642
- Practice address
- 100 W. California Blvd, Pasadena, CA 91105
- Practice phone
- Call (626) 397-2618
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Huntington Hospital - Unit
Acute Care Hospital-Unit · Pasadena, California
Find Dr. Grier's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Melissa M. Grier is an OB-GYN in Pasadena, California
Dr. Grier practices at Huntington Hospital - Unit in Pasadena, California.
Dr. Grier's NPI, 1861484420, was assigned on August 19, 2005. Dr. Grier graduated from University Of Michigan Medical School in 2001. Dr. Grier holds California license A82969.
- NPI
- 1861484420NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931124534
- NPI enumeration date
- August 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (626) 397-2618
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Melissa M. Grier practices at Huntington Hospital - Unit in Pasadena, California
Dr. Grier's primary practice is Huntington Hospital - Unit, at 100 W. California Blvd, Pasadena, CA 91105 in Los Angeles County. The practice phone is (626) 397-2618.
- Huntington Hospital - Unit100 W. California Blvd, Pasadena, CA 91105 · Los Angeles CountyPhone(626) 397-2618
Source: Dmand AI Affiliation Data
Dr. Melissa M. Grier is affiliated with 2 sites of care and 1 medical group
Dr. Grier's primary practice is Huntington Hospital - Unit in Pasadena, California. Dr. Grier is also affiliated with Huntington Hospital. The medical group on file is Ob Hospitalist Group.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Melissa M. Grier's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grier practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Huntington Hospital - Unit | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Melissa M. Grier is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Grier's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Grier is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dr. Grier is licensed in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
Clinical focus
Dmand AI lists menopause, UTI and vaginal infection among the conditions Dr. Grier treats.
OB-GYNs near Dr. Grier
Counts of OB-GYNs with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Melissa M. Grier billed Medicare for 22 services in 2024
CMS data shows 22 Medicare services from Dr. Grier across 1 procedure code in 2024, all of them office visits, for 26 Medicare patients. Medicare paid $2,208 for them. Every service was in an office.
Dr. Grier's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 592024: 2263%
Dr. Grier compared with the California median for OB-GYNs, 2024
- Dr. Grier
- California median
- Medicare services
- 22vs 5862% below
- Medicare patients
- 26vs 5250% below
- Part D claims
- 53vs 3551% above
Medians across 3,823 OB-GYNs in California with Dmand AI profiles that report each measure.
Dr. Grier's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Grier?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grier and other OB-GYNs in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Melissa M. Grier treated 26 Medicare patients in 2024, average age 73
CMS counts 26 Medicare patients who saw Dr. Grier in 2024. The largest group is 65 to 74, with 12 patients. 75% of them have high cholesterol, and 58% have arthritis. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Grier's median patient age at 37, with 99% women.
Dr. Grier's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Grier's Medicare patients, 2024
- High cholesterol75%
- Arthritis58%
- High blood pressure54%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grier's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women99%
- Men1%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Melissa M. Grier wrote 131 Medicare Part D claims in 2024
In 2024, Dr. Grier wrote 131 Medicare Part D claims for 32 patients. 70% of them were for generic drugs. CMS names the drug for 53 of them, across 3 drugs with 11 or more claims each, at $3,150 in total drug cost. In 2023, CMS named 76 claims across 4 drugs.
Dr. Grier's Part D claims by kind of drug, 2024
- Generic92 claims70%
- Brand-name and other39 claims30%
Dr. Grier's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 762024: 5330%
Drugs named by CMS: 3 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Melissa M. Grier takes part in Medicare
Dr. Grier accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Melissa M. Grier received $6,642 in industry payments from 2016 to 2025
CMS Open Payments shows 194 general payments to Dr. Grier from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 64% of the total. Abbvie Inc. paid the most, $2,031.
General payments to Dr. Grier by program year, 2016 to 2025
General payments to Dr. Grier by kind, 2016 to 2025
- Food and beverage$4,27164%
- Travel and lodging$2,23434%
- Consulting fees$1002%
- Education$240%
- Gifts$140%
Companies that paid Dr. Grier the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Melissa M. Grier has 1 award and honors on record
Dmand AI lists 1 award for Dr. Grier.
Awards and honors for Dr. Grier
- Undated
- ACOG Fellow
Source: Dmand AI Professional Profile Data
Dr. Melissa M. Grier graduated from University Of Michigan Medical School
Dr. Grier graduated from University Of Michigan Medical School in 2001.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Melissa M. Grier accepts plans from 7 insurance carriers
Dr. Grier is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Molina
Plan types Dr. Grier accepts, by number of carriers
- Medicare7
- PPO5
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Melissa M. Grier's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Melissa M. Grier
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Melissa M. Grier's NPI number?
Dr. Melissa M. Grier's NPI number is 1861484420. It was assigned on August 19, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Melissa M. Grier?
Dr. Melissa M. Grier is an OB-GYN in Pasadena, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Melissa M. Grier practice?
Dr. Grier practices at 100 W. California Blvd, Pasadena, CA 91105. Dr. Grier's primary practice is Huntington Hospital - Unit in Pasadena, California.
What is Dr. Melissa M. Grier's office phone number?
The practice phone on file for Dr. Grier is (626) 397-2618.
What is Dr. Melissa M. Grier's medical license number?
Dr. Grier holds California license A82969.
Which hospitals is Dr. Melissa M. Grier affiliated with?
Dr. Grier is affiliated with Huntington Hospital. Dmand AI links Dr. Grier to 1 more hospital.
What medical group is Dr. Melissa M. Grier part of?
Dr. Grier is linked to Ob Hospitalist Group.
Does Dr. Melissa M. Grier accept Medicare?
Yes. CMS data shows Dr. Grier billed Medicare for 22 services in 2024, and Dr. Grier accepts Medicare assignment.
How many Medicare patients does Dr. Melissa M. Grier see?
CMS counts 26 Medicare patients who saw Dr. Grier in 2024, with an average age of 73.
Is Dr. Melissa M. Grier board certified?
Yes. Dr. Grier is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
Show 6 more questionsShow fewer questions
What services does Dr. Melissa M. Grier bill to Medicare?
In 2024, Dr. Grier's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Melissa M. Grier go to medical school?
Dr. Grier graduated from University Of Michigan Medical School in 2001.
What drugs does Dr. Melissa M. Grier prescribe most?
In 2024 Medicare Part D data, Dr. Grier's most prescribed drugs by claims were Estradiol, Estradiol (Twice Weekly) and Progesterone.
Has Dr. Melissa M. Grier received payments from drug or device companies?
CMS Open Payments shows $6,642 in general payments to Dr. Grier from 32 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Melissa M. Grier been practicing?
Dr. Grier graduated from medical school in 2001, 25 years ago.
What insurance does Dr. Melissa M. Grier accept?
Dr. Grier is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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