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- 3460 Old Washington Rd, Suite 203A, Waldorf, MD 20602
About Dr. Sein
Based in Waldorf, MD, Collins P. Sein, MD is listed in the NPI registry under internal medicine. According to Medicare claims data, Collins cared for 1,097 Medicare patients across 1,728 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, administration of influenza virus vaccine, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. NPI 1699769554 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
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
- (301) 934-8811
- Email not available
Practice Locations
3460 OLD WASHINGTON RD SUITE 203A
Waldorf, MD 20602
Conditions Commonly Evaluated or Treated
Within Internal Medicine 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
- Allergies
- Diabetes
- Flu
- Hypothyroidism
- Strep throat
- UTI
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
- Chronic kidney disease
- Enlarged prostate
Respiratory
Blood & Circulation
- Blood clots
Blood disorders
- Anemia
Brain & Nerves
Brain and nerves
- Vertigo
Cardiac and vascular
- AFib
Digestive
Heart & Circulation
- Heart disease
Infections
- Impetigo
Kidney & Bladder
Lungs & Breathing
Mental Health
- Generalized anxiety disorder
- Insomnia and Sleep Problems
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Most searched procedures
- Annual physical
- Blood test
- Flu shot
- Medicare wellness visit
- Sick visit
- TB test
- Well-woman exam
Preventive and evaluation
- Medication management
- Post-hospital transitional care
Screening and diagnostic testing
- EKG
- Spirometry
Bones & Joints
- Trigger Point Injections
Brain and nerves
Cancer screening
- Colon Cancer Screening Referral
- Mammogram Referral
Digestive
Exams & Consultations
- Pre-Op Clearance Exam
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart health
- Cardiac Stress Test Referral
Imaging referral
- Abdominal Ultrasound Referral
Immunizations
Lab tests
- Urinalysis
Lungs & Breathing
- At-Home Sleep Study Order
Metabolic & Weight
- Weight Loss Injections and Medication
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
- Cryotherapy for skin lesions
- Earwax removal
- Incision and drainage of an abscess
- Skin biopsy
Office Procedures
- Skin Tag and Mole Removal
- Vitamin B12 Injections
- Wart Removal
Pain management
- Knee Joint Injection
Preventive & Routine Care
- Smoking cessation counseling
Screenings & Diagnostics
- Bone Density Scan Referral
- Diabetes Screening and A1C Test
Sexual health
- STI Testing
Procedures Most Often Billed to Medicare
1,728 services · 1,097 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine, trivalent derived from cell cultures | Treatment | 90661 |
105 | More often than most peers in Internal Medicine |
| Influenza vaccine, inactivated | Treatment | 90653 |
75 | More often than most peers in Internal Medicine |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
45 | As often as other peers in Internal Medicine |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
35 | As often as other peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
1,120 | More than most peers in Internal Medicine |
| Administration of influenza virus vaccine | Billing code | G0008 |
182 | More than most peers in Internal Medicine |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
155 | More often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
11 | Less often than most peers in Internal Medicine |
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 internists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
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 — 16 related providers in 2 groups
Other internists in Waldorf 8
Same specialty, same city.
Also performs Influenza vaccine, trivalent derived from cell cultures 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does Dr. Sein specialize in?
Dr. Sein is an internist in Waldorf, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where is Dr. Sein located?
Dr. Sein is listed at 3460 Old Washington Rd Suite 203A, Waldorf, MD 20602. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Sein's phone number?
The number on file is (301) 934-8811. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Sein's NPI number?
Dr. Sein's National Provider Identifier is 1699769554. 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
How long has Dr. Sein been practicing?
Dr. Sein has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Sein do most often?
According to Medicare billing data, Dr. Sein provides treatments such as influenza vaccine, trivalent derived from cell cultures and influenza vaccine, inactivated, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Sein confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Sein. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.