Dr. Stephen Ac Parnell, MD
- Medicare services, 2024
- 1,806
- Medicare patients, 2024
- 672
- Part D claims, 2024
- 1,402
- MIPS score, 2024
- 75
- Hospital affiliations
- 1
- Practice address
- 575 E Hardy St, Inglewood, CA 90301
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Centinela Valley Endoscopy Center - HOPD
Acute Care Hospital outpatient department · Inglewood, California
Find Dr. Parnell'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. Stephen Ac Parnell is a gastroenterologist in Inglewood, California
Dr. Parnell practices at Centinela Valley Endoscopy Center - HOPD in Inglewood, California.
Dr. Parnell's NPI, 1609968320, was assigned on September 29, 2006. Dr. Parnell graduated from Howard University College Of Medicine in 1974. Dr. Parnell holds California license G45223.
- NPI
- 1609968320NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274583778
- NPI enumeration date
- September 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 78
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Ac Parnell practices at Centinela Valley Endoscopy Center - HOPD in Inglewood, California
Dr. Parnell's primary practice is Centinela Valley Endoscopy Center - HOPD, at 575 E Hardy St, Inglewood, CA 90301.
- Centinela Valley Endoscopy Center - HOPD575 E Hardy St, Inglewood, CA 90301
Source: Dmand AI Affiliation Data
Dr. Stephen Ac Parnell is affiliated with 3 sites of care and 1 medical group
Dr. Parnell's primary practice is Centinela Valley Endoscopy Center - HOPD in Inglewood, California. Dr. Parnell is also affiliated with Centinela Hospital Medical Center. The medical group on file is Coast Gastroenterology. Dmand AI also links Dr. Parnell to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Stephen Ac Parnell's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Parnell practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Centinela Valley Endoscopy Center - HOPD | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen Ac Parnell is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Parnell's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Parnell is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Parnell is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute gallbladder or bile duct inflammation, acute gastroduodenitis, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, gastroduodenitis and gastroenteritis among the conditions Dr. Parnell treats.
Gastroenterologists near Dr. Parnell
Counts of gastroenterologists 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. Stephen Ac Parnell billed Medicare for 1,806 services in 2024
CMS data shows 1,806 Medicare services from Dr. Parnell across 14 procedure codes in 2024, for 672 Medicare patients. Medicare paid $167,726 for them.
Dr. Parnell's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,6392024: 1,5436%
- Surgery
- 2023: 1972024: 1875%
- Other services
- 2023: 822024: 767%
Where Dr. Parnell's Medicare services took place, 2024
- In an office64236%
- In a facility1,16464%
Dr. Parnell compared with the California median for gastroenterologists, 2024
- Dr. Parnell
- California median
- Medicare services
- 1,806vs 5863.1 times
- Medicare patients
- 672vs 3022.2 times
- Part D claims
- 1,169vs 3803.1 times
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Parnell'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Parnell and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Ac Parnell treated 672 Medicare patients in 2024, average age 72
CMS counts 672 Medicare patients who saw Dr. Parnell in 2024. The largest group is 65 to 74, with 305 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 71% are also on Medicaid. Their average risk score is 2.40, 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. Parnell's median patient age at 61, with 58% women.
Dr. Parnell's Medicare patients by age, 2024
Dr. Parnell's Medicare patients by sex, 2024
- Women39559%
- Men27741%
Chronic conditions among Dr. Parnell's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Diabetes52%
- Ischemic heart disease42%
- Chronic kidney disease40%
- Heart failure37%
- COPD36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Parnell's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen Ac Parnell wrote 1,402 Medicare Part D claims in 2024
In 2024, Dr. Parnell wrote 1,402 Medicare Part D claims for 594 patients. 78% of them were for generic drugs. CMS names the drug for 1,169 of them, across 32 drugs with 11 or more claims each, at $479,009 in total drug cost. In 2023, CMS named 1,383 claims across 36 drugs.
Dr. Parnell's Part D claims by kind of drug, 2024
- Generic1,099 claims78%
- Brand-name303 claims22%
Dr. Parnell'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.
Drug classes CMS tracks in Dr. Parnell's Part D claims, 2024
- Antibiotics5%70 of 1,402 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3832024: 1,16915%
Drugs named by CMS: 32 in 2024, 36 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
Dr. Stephen Ac Parnell scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Parnell for performance year 2024, reported individually. Dr. Parnell accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Parnell as offering telehealth. CMS counts 192 procedures of colonoscopy by Dr. Parnell, more than 93% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- MIPS final score, 2024
- 75 of 100
Where Dr. Parnell ranks in Medicare procedure volume
- Colonoscopy
- 93rd percentile192 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 65th percentile55 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen Ac Parnell received $18,234 in industry payments from 2016 to 2025
CMS Open Payments shows 782 general payments to Dr. Parnell from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 89% of the total. Abbvie Inc. paid the most, $4,682.
General payments to Dr. Parnell by program year, 2016 to 2025
General payments to Dr. Parnell by kind, 2016 to 2025
- Food and beverage$16,23389%
- Grants$1,6679%
- Gifts$3062%
- Education$290%
Companies that paid Dr. Parnell 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. Stephen Ac Parnell graduated from Howard University College Of Medicine
Dr. Parnell graduated from Howard University College Of Medicine in 1974.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Stephen Ac Parnell accepts plans from 17 insurance carriers
Dr. Parnell is in network with 17 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Humana
- LA Care
- Blue Cross Blue Shield of Massachusetts
- +9 more carriersWith a free account
Plan types Dr. Parnell accepts, by number of carriers
- Medicare11
- PPO10
- HMO9
- POS5
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen Ac Parnell'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Stephen Ac Parnell
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. Stephen Ac Parnell's NPI number?
Dr. Stephen Ac Parnell's NPI number is 1609968320. It was assigned on September 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Ac Parnell?
Dr. Stephen Ac Parnell is a gastroenterologist in Inglewood, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Stephen Ac Parnell practice?
Dr. Parnell practices at 575 E Hardy St, Inglewood, CA 90301. Dr. Parnell's primary practice is Centinela Valley Endoscopy Center - HOPD in Inglewood, California. Dmand AI also links Dr. Parnell to 1 group practice or clinic.
What is Dr. Stephen Ac Parnell's medical license number?
Dr. Parnell holds California license G45223.
Which hospitals is Dr. Stephen Ac Parnell affiliated with?
Dr. Parnell is affiliated with Centinela Hospital Medical Center.
What medical group is Dr. Stephen Ac Parnell part of?
Dr. Parnell is linked to Coast Gastroenterology.
Does Dr. Stephen Ac Parnell accept Medicare?
Yes. CMS data shows Dr. Parnell billed Medicare for 1,806 services in 2024, and Dr. Parnell accepts Medicare assignment.
Does Dr. Stephen Ac Parnell offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Parnell as offering telehealth services.
What is Dr. Stephen Ac Parnell's MIPS score?
Dr. Parnell's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
How many Medicare patients does Dr. Stephen Ac Parnell see?
CMS counts 672 Medicare patients who saw Dr. Parnell in 2024, with an average age of 72.
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Is Dr. Stephen Ac Parnell board certified?
Yes. Dr. Parnell is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Stephen Ac Parnell bill to Medicare?
In 2024, Dr. Parnell's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99213) and office visit, new patient (99204).
Where did Dr. Stephen Ac Parnell go to medical school?
Dr. Parnell graduated from Howard University College Of Medicine in 1974.
What drugs does Dr. Stephen Ac Parnell prescribe most?
In 2024 Medicare Part D data, Dr. Parnell's most prescribed drugs by claims were Sod Sulf-Potass Sulf-Mag Sulf, Omeprazole and Pantoprazole Sodium.
Has Dr. Stephen Ac Parnell received payments from drug or device companies?
CMS Open Payments shows $18,234 in general payments to Dr. Parnell from 28 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Stephen Ac Parnell been practicing?
Dr. Parnell graduated from medical school in 1974, 52 years ago.
What insurance does Dr. Stephen Ac Parnell accept?
Dr. Parnell is in network with 17 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.
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