Donald Douglas Merrill II, PA-C
- Medicare services, 2024
- 245
- Medicare patients, 2024
- 170
- Part D claims, 2024
- 1,166
- MIPS score, 2024
- 97
- Hospital affiliations
- 3
- Practice address
- 3333 N Foster Maldonado Blvd, Eagle Pass, TX 78852
- Practice phone
- Call (830) 773-5321
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Donald Douglas Merrill II is a physician assistant in Eagle Pass, Texas
Donald Merrill practices at Fort Duncan Regional Medical Center in Eagle Pass, Texas, part of Universal Health Services.
Donald Merrill's NPI, 1073798567, was assigned on January 3, 2008.
- NPI
- 1073798567NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537389796
- NPI enumeration date
- January 3, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (830) 773-5321
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Donald Douglas Merrill II practices at Fort Duncan Regional Medical Center in Eagle Pass, Texas
Donald Merrill's primary practice is Fort Duncan Regional Medical Center, at 3333 N Foster Maldonado Blvd, Eagle Pass, TX 78852 in Maverick County. The practice phone is (830) 773-5321.
- Fort Duncan Regional Medical Center3333 N Foster Maldonado Blvd, Eagle Pass, TX 78852 · Maverick CountyPhone(830) 773-5321
Source: Dmand AI Affiliation Data
Donald Douglas Merrill II is affiliated with 4 sites of care and 3 medical groups
Donald Merrill's primary practice is Fort Duncan Regional Medical Center in Eagle Pass, Texas, part of Universal Health Services. Donald Merrill is also affiliated with Peterson Regional Medical Center. The medical group on file is SCP Health. Dmand AI also links Donald Merrill to 1 more hospital, 2 medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Donald Douglas Merrill II's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Donald Merrill practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fort Duncan Regional Medical Center | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Donald Douglas Merrill II is one of 8,663 physician assistants in Texas
Physician assistant is Donald Merrill's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Donald Merrill is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
Specialties and state licenses
- Physician assistantPrimary
Clinical focus
Dmand AI lists bipolar disorder, chronic kidney disease, chronic obstructive pulmonary disease (COPD), conjunctivitis, contact dermatitis, ear infection, epilepsy and fibromyalgia and chronic pain among the conditions Donald Merrill treats.
Physician assistants near Donald Merrill
Counts of physician assistants 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
Donald Douglas Merrill II billed Medicare for 245 services in 2024
CMS data shows 245 Medicare services from Donald Merrill across 5 procedure codes in 2024, for 170 Medicare patients. Medicare paid $18,279 for them.
Donald Merrill's Medicare services by type, 2024
- Office and hospital visits223
- Tests and treatments22
Where Donald Merrill's Medicare services took place, 2024
- In an office11145%
- In a facility13455%
Donald Merrill compared with the Texas median for physician assistants, 2024
- Donald Merrill
- Texas median
- Medicare services
- 245vs 2297% above
- Medicare patients
- 170vs 9972% above
- Part D claims
- 862vs 2962.9 times
Medians across 5,541 physician assistants in Texas with Dmand AI profiles that report each measure.
Donald Merrill'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 Donald Merrill?
Medicare shows one payer. Book a meeting to get commercial claims data for Donald Merrill and other physician assistants in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Donald Douglas Merrill II treated 170 Medicare patients in 2024, average age 72
CMS counts 170 Medicare patients who saw Donald Merrill in 2024. The largest group is 65 to 74, with 67 patients. 75% of them have high blood pressure, and 71% have high cholesterol. 38% are also on Medicaid. Their average risk score is 1.51, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Donald Merrill's median patient age at 40, with 59% women.
Donald Merrill's Medicare patients by age, 2024
Donald Merrill's Medicare patients by sex, 2024
- Women10361%
- Men6739%
Chronic conditions among Donald Merrill's Medicare patients, 2024
- High blood pressure75%
- High cholesterol71%
- Arthritis56%
- Diabetes51%
- Ischemic heart disease45%
- Anxiety32%
- Chronic kidney disease32%
- Osteoporosis24%
Share of Medicare patients with each condition. A patient can have several.
Donald Merrill's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Donald Douglas Merrill II wrote 1,166 Medicare Part D claims in 2024
In 2024, Donald Merrill wrote 1,166 Medicare Part D claims for 472 patients. 91% of them were for generic drugs. CMS names the drug for 862 of them, across 25 drugs with 11 or more claims each, at $5,248 in total drug cost.
Donald Merrill's Part D claims by kind of drug, 2024
- Generic1,063 claims91%
- Brand-name103 claims9%
Donald Merrill'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 Donald Merrill's Part D claims, 2024
- Opioids4%44 of 1,166 claims
- Antibiotics22%258 of 1,166 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
Donald Douglas Merrill II scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Donald Merrill for performance year 2024, reported as part of a group. Donald Merrill accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Donald Merrill's MIPS scores, performance year 2024
- 97of 100Final score
- 90.8of 100Quality
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Donald Douglas Merrill II received $14 in industry payments in 2024
CMS Open Payments shows 1 general payment to Donald Merrill from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $14.
Companies that paid Donald Merrill the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Donald Douglas Merrill II is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Donald Douglas Merrill II'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 DataDmand AI Org Hierarchy 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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 Donald Douglas Merrill II
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Donald Douglas Merrill II's NPI number?
Donald Douglas Merrill II's NPI number is 1073798567. It was assigned on January 3, 2008, and it is active in the NPI Registry.
What does Donald Douglas Merrill II specialize in?
Donald Douglas Merrill II is a physician assistant in Eagle Pass, Texas. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Donald Douglas Merrill II practice?
Donald Merrill practices at 3333 N Foster Maldonado Blvd, Eagle Pass, TX 78852. Donald Merrill's primary practice is Fort Duncan Regional Medical Center in Eagle Pass, Texas, part of Universal Health Services. Dmand AI also links Donald Merrill to 1 hospital, 2 medical groups and 1 group practice or clinic.
What is Donald Douglas Merrill II's office phone number?
The practice phone on file for Donald Merrill is (830) 773-5321.
Which hospitals is Donald Douglas Merrill II affiliated with?
Donald Merrill practices at Fort Duncan Regional Medical Center in Eagle Pass, Texas. Donald Merrill is also affiliated with Peterson Regional Medical Center. Dmand AI links Donald Merrill to 1 more hospital.
What medical group is Donald Douglas Merrill II part of?
Donald Merrill is linked to SCP Health. Dmand AI links Donald Merrill to 2 more medical groups.
Does Donald Douglas Merrill II accept Medicare?
Yes. CMS data shows Donald Merrill billed Medicare for 245 services in 2024, and Donald Merrill accepts Medicare assignment.
What is Donald Douglas Merrill II's MIPS score?
Donald Merrill's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Donald Douglas Merrill II see?
CMS counts 170 Medicare patients who saw Donald Merrill in 2024, with an average age of 72.
Is Donald Douglas Merrill II board certified?
Yes. Donald Merrill is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
Show 4 more questionsShow fewer questions
What services does Donald Douglas Merrill II bill to Medicare?
In 2024, Donald Merrill's most billed Medicare services were office visit, established patient (99214), emergency department visit (99284) and emergency department visit (99285).
What drugs does Donald Douglas Merrill II prescribe most?
In 2024 Medicare Part D data, Donald Merrill's most prescribed drugs by claims were Cephalexin, Ondansetron HCl and Meclizine HCl.
Has Donald Douglas Merrill II received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Donald Merrill from 1 company from 2024 to 2024. The largest total came from Eli Lilly and Company.
How long has Donald Douglas Merrill II been practicing?
Donald Merrill graduated from medical school in 2007, 19 years ago.
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