Provider Profile
Dennis S. O'Brien, PAC
Unclaimed ProfileAbout Dennis O'brien
Dennis S. O'Brien, PAC is a physician assistant — medical based in Springfield, MA. According to Medicare claims data, Dennis cared for 250 Medicare patients across 291 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (413) 794-7033
- Email not available
Practice Locations
3300 MAIN ST 3RD FLOOR, STE C&D
Springfield, MA 01199
Conditions and Services Within This Provider's Scope
Within Physician Assistant - Medical generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Common cold
- Diabetes
- Flu
- High blood pressure
- Sinus infection
- UTI
Allergies
- Hives
- Seasonal allergies
Blood
- Iron-deficiency anemia
Bone and joint
- Osteoporosis
- Tendinitis and tendinopathy
Digestive
- Acid reflux
- IBS
- Stomach Bug and Food Poisoning
Digestive health
- Constipation
- Fatty liver disease
- Hemorrhoids
Ear, Nose & Throat
- Ear infection
Endocrine
- Hypothyroidism
Eye Care
- Pink eye
Foot and ankle
- Foot fungus
- Heel pain
General Health
Hair and scalp
- Hair loss
Headache and brain
- Tension headaches
Heart & Circulation
- High cholesterol
Hormones
- Perimenopause
- Testosterone deficiency
Infections
- Cellulitis
- COVID-19
- Herpes simplex of the skin
- Ringworm
- Strep throat
Injury
- Sprains and muscle strains
Men's Health
- Erectile dysfunction
Mental Health
Metabolic
- Obesity
Nerve conditions
- Carpal tunnel
- Sciatica
Neurology
- Dizziness and vertigo
- Migraines
Pain
- Gout
- Low back pain
- Osteoarthritis
- Whiplash
Respiratory
Sexual Health
Skin
- Acne
- Eczema
- Psoriasis
- Shingles
Skin cancer
Skin conditions
Sleep
Women's Health
- Yeast infection
Procedures & services
Most searched procedures
Allergies
Counseling
Dermatology
Diagnostic Tests
- COVID-19 Rapid Test
- Mono Rapid Test
- Rapid Flu Swab
- Rapid strep testing
- TB Skin Test
- Urine Drug Screen
- Urine Pregnancy Test
Ear, Nose & Throat
Evaluations
Exams
General Care
Heart & Circulation
Heart health
Hormones
Injections
- Bursa injection
- Joint injection or aspiration
- Vitamin B12 Injections
Injury Care
Lab tests
- Cholesterol screening
- Hemoglobin A1c Test
- Thyroid Blood Test
- Urinalysis
Mental Health
- Depression screening
Metabolic
Minor surgery
- Cyst Removal
Minor Surgery
- Incision and drainage of an abscess
- Ingrown toenail removal
- Minor laceration repair
- Superficial foreign-body removal
Pain Management
Prevention
Respiratory
Screening
Skin procedures
Treatments
Virtual care
Women's Health
Women's health
Procedures Most Often Billed to Medicare
291 services · 250 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
111 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
83 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
43 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
32 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
22 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 22 related providers in 3 groups
Other physician assistants in Springfield 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2004 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dennis S. O'Brien's specialty?
Dennis S. O'Brien is a physician assistant in Springfield, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Physician Assistant — Medical”.
NPI registry
Where can I find Dennis S. O'Brien?
Dennis S. O'Brien is listed at 3300 Main St 3Rd Floor, Ste C&D, Springfield, MA 01199. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dennis S. O'Brien?
The number on file is (413) 794-7033. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dennis S. O'Brien's NPI number?
Dennis S. O'Brien's National Provider Identifier is 1407895956. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dennis S. O'Brien's education?
Dennis S. O'Brien attended Other, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How long has Dennis S. O'Brien been practicing?
Dennis S. O'Brien has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What is Dennis S. O'Brien known for?
According to Medicare billing data, Dennis S. O'Brien the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dennis S. O'Brien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dennis S. O'Brien. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.